| Offers 47 equations for HP Prime's Solver App. Just run the eqlib program, select the category that you are interested in, and select the equation within that category and you are off and running. Categories include: Geometry (areas, volumes, surface areas), Finance (monthly loans, sales tax, break-even), Temperature Conversion (Fahrenheit to and from Celsius), Physics: Problems of Motion (linear distance, circular motion, pendulums, terminal & escape velocity), Sound (speed of sound, Doppler effect, loudness), Optics (Lens and Snell equations, spherical refraction), Electronics (2 resistors series and parallel, thermal noise, Ohm's Law), Astronomy (parallax, luminosity, Kepler's 3rd Law, time dilation), Great Circle Calculations, Angle of Incidence Calculations, Gases (Ideal and Boyle's Gas Laws, heat capacity, air density, isothermal expansion), and Fluids (depth pressure, fluid flow, Bernoulli's Equation). |
Two versions of the original Star Trek application, ported to Python for the Prime. One is the 1972 STTR1 by Mike Mayfield and the other is the 1973 Project Delta by Aron K. Insinga. Both run in the terminal, using ASCII art.
Educational App allowing one dimensional kinematics problems to be entered, solved using the standard kinematics formulae, and visualized as vertical or horizontal motion problems via a simple graphical representation. Includes PDF documentation.
Prime port of Gabriele Cirulli's popular game 2048, re-written in Python.
Slide tiles to combine matching tiles into single tiles with twice the value.
The game of 2048 with touch screen support and selectable color schemes.
Lets you draw pixels in the desired colors, using the arrows and SYMB and HELP, and selecting the color with ESC, and then shows it in 3D.
Plots a colored 3-dimensional parametric equation on an HP Prime of the form z=(t,u) where t and u are angular parameters in degrees, generally varying from zero to 360 degrees. Your Prime must be set to Degrees mode in both CAS and Home. The program will also ask for the number of slices in t and u, I generally use 40 for both. The viewing angle for the sample plot is 5 degrees for the x-axis and 25 degrees for the z-axis. There are sample functions for a toroid (doughnut), sphere, orbital (modulated sphere) and spirals. The program is based on an old Byte magazine article discussing the mathematical principles behind 3D plotting.
Allows you to plot 3D parametric functions and orbit your view around them. For controls, press the "Help" key.x
Calculates the structural number with the AASHTO equation for the pavement course.
Given any three of the five variables in the acceleration equation, the other two variables are calculated. As with all of the author's spreadsheets, the blue text cells are the input data and the red text cells are the calculated output data.
Lists various acids, giving you the name based on the chemical formula and vice versa.
Calculates the monthly payment of lease several payments are paid simultaneously at the beginning of the lease. Requires firmware 13441 or higher.
Calculates loans with advanced payments (for example, a 60 month loan with 3 advance payments), giving the monthly payment (less the advance) and calculating the monthly and annual yield (rate).
Also calculates the payment of a loan with residual value (for payment and yield, with the IRR method).
Simulates an air hockey table
Spreadsheet that illustrates the CHOOSE command. The user 'Chooses' both the departing and the arriving airports and inputs the wind conditions. The spreadsheet then calculates the navigation data needed for the flight. The airports' longitude and latitude data are now stored in the spreadsheet itself rather than in List1 and List2. NOTE: The calculator must be in the Degrees mode to operate property.
Calculates the Airy functions, Ai and Bi.
Clone of the game Almost BlockOut, which is a kind of 3D Tetris game.
Calculates an amortization schedule for loans, given the interest rate, the amount borrowed, and the duration of the loan.
Draws an analog clock displaying the current time. Written in Python.
Inspired by the Angry Birds game for other mobile platforms.
Given the right ascension (α) and declination (δ) of two stars of the same epoch (J2000.0 is the most current), calculates the distance between the stars.
Program for the piping area, designed to calculate the friction factor in any flow regime (laminar, turbulent, transition). For laminar flow with Re<#00 the program uses the friction factor equation for laminar regime(fd/Re). For flow with Re> 2300 the program uses the Colebrook-White equation (1939) which covers the entire transitional and turbulent regime.
Views the list of files contained in an application. For each file its size in bytes is specified. It is possible to view pictures and to delete selected files. Written in Python.
Program that demonstrates using the MENU touch screen function to calculate the area of various polygons -- square, rectangle, circle, triangle, and diamond.
Formulas for calculating areas and volumes.
Program for solving trusses using matrices.
Calculates structural analysis of trusses by the matrix method.
Three CAS utility functions. Two of them, varslist1() and varslist2(), identify assigned variables, showing type and value. The third can be used to batch purge single-character lower-case variables.
Spaceship game where you must dodge asteroids and lasers.
Astronomy program with many built-in features. For firmware 10077 or higher.
Simulates a race between seven racers. Betting is not included.
Extension to the TEXTOUT_P function for displaying text with various attributes (bold, underlined, etc.) and using a transparency level. Includes detailed PDF instructions.
Determines some physical and thermodynamic properties of air at different altitudes. Uses the international units system (SI) and considers dry air. Altitude range permitted is from -5,000 to 20,000 meters; in this range air is considered ideal gas.
View high resolution background images, scrolling through the image with the touchscreen or the cursor keys.
A game for 1 or 2 players where one side must fire bullets at the other side, and the other side must avoid being hit by them.
Performs base conversions, including fractional parts.
Implements base functions in an RPL mode inspired by the 48GX. Includes an environment with a stack, softkeys and similar function set.
Retrieves data about our solar system planets, including our dwarf planet, Pluto, presenting you with a choose menu which will present a screen of all the data for a planet. It also has a routine to pull out a specific data point for calculations. Data available are name, radius (km), mass (kg), gravity (m/s^2), density (g/cm^3), axial tilt (°), period (days), and number of moons.
Clone of Bejeweled, where you must swap colored blocks in order to get three in a row of the same color to eliminate them.
Benchmarks how fast your Prime is (or the computer/phone simulating it). For reference, a revision A or C Prime should get 23.2 seconds, 25.5 seconds, and 245.4 seconds, and a revision D (G2) Prime should get 7.7 seconds, 8.5 seconds, and 87.4 seconds. The virtual calculator on a 2015-vintage computer should get 0.6 seconds, 0.7 seconds, and 4.1 seconds.
Finds the solution to Bernoulli's Differential Equation given as: y' + g(x)*y =(x)*y^n, calculates the constant of integration C for any initial condition y(x0) = 0, if desired, and depicts the plot of the curve of y(x).
Program to calculate the second kind Bessel function of integer order N, for any REAL X, using the function BESSY(N,X).
Calculates the Bessel function of the first kind. Two different approaches are shown.
A program for generating and drawing Bézier curves
Program to calculate and display a plot for the three biorhythm sine curves using the built-in "Function" app.
A simple Blackjack game. Nothing fancy. No insurance, no splitting, etc.; it was just for learning programming.
A full featured Blackjack game with card counting, basic strategy training, splitting, surrender, game saving, data collection and more. Works on Prime G2 as of latest firmware (2023 04 13).
Draws square blotches with random colors.
Builds truth tables for Boolean expressions. In Russian.
Bounce the ball off the bricks to break them all.
Tetris clone.
Simple command-line program to determine the molar mass (formula mass, molecular weight) of a compound. It is a reworking of %8779%.
Calculates the area, volume, moment of inertia, and centroid, with a list of figures to choose from.
Two programs to tackle common financial questions of purchasing automobiles, or other equipment that might be financed. CARPMT calculates what would be the monthly payment, while CARAFFORD calculates the sticker price that the buyer can afford.
Calculate cash flow operations (IRR, MIRR, NPV). The program is presented in two versions: the first gives three routines to calculate (Net Present Value, Internal Rate of Return and Modified Internal Rate of Return, like that in the HP 12C); the second has a menu-based interface with only one command, Cash_Flow, that runs the same routines internally.
Reads in velocity, altitude, and length then exports Reynolds number and wall spacing for a yplus of 1. Based on log law of the wall.
Plots a chaos plot.
A powerful chemical Equation Balancer that can balance a chemical equation in a fraction of a second despite the complexity of the equation. It returns all possible solutions to an equation which is not readily possible using the paper and pencil technique.
Allows you to solve typical problems of the Quantitative Chemical Analysis course: activity coefficients, acid-base equilibria, acid-base titrations and EDTA titrations.
Chess with AI. Checks legality of moves, and has computer vs computer too.
Classical 2 player chess game, allowing you to play using the touch screen. This version does not include check-mate or draw detection, nor does it check the legality of moves.
Two-player implementation of Chinese chess.
You have 15 numbered squares in a grid, and you must slide them around to put them in order. This update enables randomly generated color styles, each time opened, colors will be different from the former using RANDINT.
CHIP-8 is a very old simple language/virtual machine with only 4 KB of memory. This emulates several old CHIP ROMs: Pong, Space Invaders, and Tetris.
Alternative to CHOOSE command. Touch scroll-able with long lists, optional 'Delete' feature can be used to remove items from the choose list. Includes two sample use cases. Responds to calculator Color Theme settings.
Give any two of the seven parameters associated with circles and chords, the other five parameters are calculated. Column A gives the seven variables definitions. Columns B thru H hole one of the variables each. As with all of the author's spreadsheets, the blue text cells are the data input cells and the red text cells are the calculated output cells.
Being given a circle C described by its center (xM,yM) and radius r in combination with a point P0(x0,y0) outside, Pc(xc,yc) inside or a secant defined by f(x), this CAS-program finds characteristic items like tangents T1,T2, tangential points P1, P2, chord between P1 and P2 and some more quantities.
In two dimensions, determines the maximum and minimum tension, from two measurements of the normal and tangential tension on two right angles.
A simple clock. You can let it display in a graphical way or in terminal by modifying the variable "gui". It also offers two languages and two themes by the change of the system settings.
Does complex number calculations.
A new code editor, with line numbers, search, and syntax highlighting.
A code viewer, showing the code for your installed programs with syntax highlighting and line numbers.
Programmer's utility to determine key codes.
Calculates friction using the Colebrook-White equation using the Newton Raphson method essential for fluid course I and II, showing the table of iterations.
Transforms the current time into RGB form and displays the color as the background. You can treat it like a screensaver. Inspired by the ColourClock by Jack Hughes. The original design belongs to lookatjack.com.
The possible colors of an RGB Pixel can be thought of as a color cube with edges aligned on red, green, and blue axis. ColorCube draws the color cube in slices, and allows you to navigate about and select colors within the context of the color cube.
Lets the user scroll through various colors (black/blanco, gray/gris, white/blanco, etc.) using the plus and minus buttons, showing the names in both English and Spanish.
Shows all possible colors of the calculator (16-bit color) and returns the selected color.
Use the cursor to play with some polygons. Use left and right to change the number of sides and up and down to rotate it.
Tetris-like puzzle. It takes place inside a tall, rectangular playing area. Columns of three different symbols (such as differently-colored jewels) appear, one at a time, at the top of the well and fall to the bottom, landing either on the floor or on top of previously-fallen "Columns".
Calculates the payments for both separate loans and combined loans. This particular loan covers of three types: 80:20, 80:15:5, and 80:10:10.
3D complex function output surface for fixed real or imaginary input and 3D scatter plot of L1.
Real or imaginary axis is used for real / imaginary output domain to display a 3D output for the fixed input. {x,y,z} values in L1 are displayed with a cross and numbered in the 3D plane. Input dialogs used for configuration and touch gestures as well as keys to rotate, move and zoom the graph.
Pair of programs that do complex number plotting.
My 3D color view skills have problems interpreting complex function characteristics from the domain coloring scheme. Therefore, I played around with one imaginary and one real color intensity mapped directly linear to a given value range.
Given Mass, Height, and Time, I (lbs-ft^2) and Io (lbs-ft^2) are calculated. As with all of the author's spreadsheets, the blue text cells are the input data and the red text cells are the calculated output data.
Based on the Javascript by William J. Devenport (and modified by Adam Ford to include Fanno Flow and Rayleigh Flow).
Given cone diameter and cone height, the other eight properties are calculated. As with all of my spreadsheets, the blue text cells are the data input cells and the red text cells are the calculated output cells.
Finds the type and characteristic items of conic sections, if the general equation of 2nd order is given in the form: a0*x² + b0*x*y + c0*y² + d0*x + e0*y + f0 = and draws the plot after calculation.
In most loans and mortgages, the amount of payment applying to interest and principal depends on the running balance. This program assumes the customer wants an equal portion to apply to principal each payment. As a result, the payment itself, principal and interest, will vary.
Calculates the support moments of a continuous beam having different moments of inertia (Mb for a two-field span, Mb and Mc for a three-field beam). Several load cases for the same beam can be performed. Accepted are trapezoidal- and point loads, split in dead- and live load.
Small program for plotting the contour map of any two-variable function.
Used to study the frequency domain response of control systems consisting of a process and a controller. Open loop response with and without controller and resulting closed loop response (unity feedback loop) can be determined / compared. The app takes as input the transfer function of a process as well as the settings of a (PID) controller. It includes a ‘Bode plot’ which combines magnitude and phase plots on the same screen, indicating real frequency (log scale) and magnitude (log or dB scale) values, and not the logarithm of these values, although logarithmic scales are used. This Bode plot does not rely on the built in HP Prime plot mechanism but is programmed from scratch, including mouse movement and key press detection and custom soft key menus to accomplish functionality that would not be possible otherwise. The app also draws Nyquist and Nichols plots. Includes PDF documentation.
For control systems stability, this will give you the Routh-Hurwitz Matrix = M25, though it will not tell you how many poles lie in the left/right planes.
Shows Conway's Game of Life with a random set of initial cells.
Yet another converter which when one system is entered(Cart., Cyl. or Sph), the other two system are simultaneously converted and all three system are displayed along with the graph showing the position of each variables on the graph.
Converts between rectangular, cylindrical, and spherical coordinates. This program has a restriction where one needs a unique set of coordinates for each point. Restricting the radius to be non-negative (ρ ≥ 0), the azimuth 'θ' to lie in a specific interval spanning 360° or 2π, such as (-180°,+180°] or (-π,+π] and inclination 'φ' to specific a interval spanning 180° or π, such as [0°,180°] or [0,π].
An incomplete clone of Terry Cavanagh's Copycat. Turn based action game. Written in python. Currently only 5 powers are implemented. Warning: contains bright flashing lights.
From defined preconditions the program finds the function of return R(x) (linear or quadratic function), the function of costs C(x) =*x^3 + b*x^2 +c*x + d and calculates characteristic properties of both of them and the profit function P(x) =(x)-C(x).
Set of variables with French names for common colors, useful for programmers.
A compact and elegant program that allows the customization of the soft keys in a consistent manner, whether for the global environment or for each Prime app. Now it is possible to have at any entry window your preferred characters or commands, e.g., Greek characters for scientific writing, preferred units for fast unit conversion or fast access commands with customized entry. Menus are swiftly managed with the four ways of the directional pad (left/right/up/down).
A cube that can be rotated.
3D cube puzzle simulator, like a Rubik's Cube. A 3D cube is displayed in 3D from two views; front/top and back/bottom. Moves are made using the keypad numbers followed by + or -. A list of moves in standard form is maintained on screen, plus exported to a list variable (L0.) A help screen is supplied and accessible from the 'Help' button inside the app.
Horizontal and vertical curve calculator where you enter the curve data you have and let it calculate the rest. If one of your inputs is degree curve it will prompt for chord or arc definition. After it calculates the curve data you press OK or "Enter" to bring up the next screen with the areas.
This is a small program that can help convert bicycle speed, cadence, and front and rear gear ratios, according to your wheel circumference.
Dice throwing simulation game.
The triforce of courage was divided into eight fragments scattered around the four corners of Hyrule's sky. Fortunately the Cyclos storm god lends you his flying cloud, the famous Kinto1. The legend tells that rare are the beings able to ride it, that one must have the perfectly pure heart. Collect a maximum of fragments to realize the best possible score! The game allows you to control Kinto1 directly with your calculator, with two control modes: manual, where you control in real time the movements of the cloud with not 4 but 3 keys, and autopilot, where you provide the movements in advance in the form of a list, switching to manual mode once the list is exhausted. In either case you will be given a score that your goal is to maximize. Created for a French competition through 
Using a control panel of 30 potentiometers from 0 to 1 that control up to 252 lamps, light up the maximum number of light bulbs with minimal energy while wasting as little as possible. Created for a French competition through 
Table of changes and delta trinomial program.
Set the number of digits, enter the position of the resistances or impedances in the network, and then enter the data for the wye network and the delta network, and it will give the result in both rectangular and polar forms.
Calculates AASHTO T-191 density control using the sand cone method.
Draw pictures with 10 colors and 3 brush widths with your fingers.
Allows you to calculate the Dew Point (temperature, pressure and composition of the first drop created in a gas mixture) and Bubble Point (temperature, pressure and composition of the first bubble created in a liquid) of a mixture of "N" number of components. To make the calculation, the Secant Method is used to find the roots. You can also choose between using Antoine or McWilliams (if it's a hydrocarbons' mixture) parameters.
Does calculations for Normal Strap (Bisection Method - Secant Method), Critical Strap (Bisection Method - Secant Method), Flows (Maning equation), and Maximum Efficiency (Maning Equation)
Calculates the inner diameter of a pipeline using 9 calculation models (Theoretic, Weimouth, Panhandle-A, Panhandle-B, IGT, Mueller, Fritzsche, AGA-A, AGA-B). The listed calculation models are specific for flowing real gases in long ducts under approximately constant temperature (Real Fluid Isothermal Flow). Models include the gravitational energy term, allowing better results for ducts through mountain regions.
An implementation of the Dichotomy number guessing game.
Finds the solution y(x) = y_hom + y_part to the differential equation (D.E.) of 4th order a*y^(4) + b*y''' + c*y'' + d*y' + e*y = g(x) or of 3rd order b*y''' + c*y'' + d*y' + e*y = g(x), where a = 0.
Finds the solution y(x) = y_hom + y_part to the differential equation (D.E.) of 4th order a*y^(4) + b*y''' + c*y'' + d*y' + e*y = g(x) or of 3rd order (a = 0) b*y''' + c*y'' + d*y' + e*y = g(x), where g(x) = e^(alpha*x) * [c1*SIN(beta*x) + c2*COS(beta*x)].
Performs the design of rigid pavements using the AASHTO-93 methodology.
A distance, speed and time calculator that uses the Units, MKSA, and CONVERT functions. Enter any two variables and solve for the third. When solving for the unknown variable, you need to specify the units of the unknown variable. When using h°m′s'' units for time, you need to enter the degrees, minute, and seconds symbols. One hour, 30 minutes and 45 seconds is entered as 1°30′45"
This is a very simple drawing program for drawing white pixels on a black canvas, with a nice red cursor. It is good for pixelart but the creations can NOT be saved, but if you are bored it maybe has some value.
A video draw poker game written in PPL. It provides two versions of Video Draw Poker for playing Jacks or Better and Deuces Wild.
Explains the 3D features of the LINE and TRIANGLE commands, with sample code to draw 3D lines and boxes.
A function that draws a set number of cards from a deck of 52 standard playing cards, along with a program that uses it to allow you to play poker.
Bitmap editing and drawing software designed in a mix of Python and PPL. G2 recommended.
Calculates M0, Magnitude and energy of a quake, and compares quakes. All of the formulae here can be applied to earthquakes, many can also be applied to other planets.
Ever wondered at which speed you rotate on your location on earth? Find out with this application. For different latitudes on the planet you can find the speed.
Adds key assignment to EEX to allow sto with 2 clicks. In other words, press EEX+EEX for EEX. Press Shift+EEX+EEX for ▶. Press EEX+a..z for ▶a..z (no ALPHA on needed). It also detects if a char exist before the expression/number to be wanted to store and uses Ans▶ or ▶ according to situation. When sto mode is on, ▶a..z symbol is displayed in the status bar. Additionally it works with uppercase in non-CAS mode.
An update to 
Uses the concept of 
Program for the Thermodynamics course. Contains the equations of VAN DER WALLS-REDLICH KWOONG-R.K SOAVE-PENG ROBINSON.
Finds for a date given as yyyy.mmdd the next dates for full moon and new moon and checks for the occurence of a lunar and/or solar eclipse. If positive, some characteristics like kind of eclipse, magnitude and size of shadow in Earth radii ( E.R. ) are calculated.
Electrical and electronic circuit solver that solves AC or DC circuits with linear and non-linear elements. The program implements a full graphic interface to edit circuits, with useful functionality such as copy/paste, undo/redo, moving and rotation of parts, etc. It can solve both AC and DC circuits with both linear and non-linear elements. The non-linear elements supported include: BJTs, MOSFETS, diodes, LEDs, and zeners. The results of the solution are displayed in the circuit editor itself.
Being given an ellipse E described by its center (xM,yM), semi-major axis a and semi-minor axis b in combination with a point P0(x0,y0) outside, Pc(xc,yc) inside or a secant defined by f(x), this CAS-program finds characteristic items like tangents T1, T2, tangential points P1, P2, chord between P1 and P2 and some more quantities and draws the plot.
User inputs the semimajor axis and eccentricity of an elliptical orbit. The code finds distances for periapsis, apoapsis, semiminor axis, semilatus rectum, focal parameter, circumference of orbit, and the separation between the primary focus and the orbiting object where the latter has its average speed in orbit relative to the former, and, finally, the true anomalies for this average speed.
Calculates sound emissions from compressed air pipes.
A compilation of equations used in Electrical Engineering. The program will pass the "selected topic" to the Prime Solver App. Handles Ohm's law, circuit analysis, passive filters, delta/wye conversions, Wheatstone bridges, transformers, and more. Includes PDF documentation.
Provides a set of routines for demonstrating how various entry methods work, including WAIT(0), WAIT(-1), GETKEY, ISKEYDOWN, ISKEYDOWN(-1), and MOUSE.
Makes it very easy to switch between Textbook, Algebraic, and RPN with visual feedback. Also includes a pop-up version.
Epidemic model SIR. Inspired by a recent video on Numberphile I have coded the well-known SIR-model of an epidemic.
Useful program that contains all the factors for calculations involving Economic Engineering.
Extensive library of equations that can be used in a course in Fiber Optics. The variables may vary slightly, but a variable description is provided in each topics before the program is transferred to the Solver. There are a total of ~130 variables all listed with a description. If you are familiar with Prime programming, you can append your own equations to expand the library. Includes comprehensive PDF documentation.
Has the program FIBMAT to generate the Fibonacci Triangle in matrix form, and the program FIBTRI to visualize the Fibonacci Triangle.
Play against the computer to get five in a row first.
The object of the game is to unscramble five-letter words. You only get one chance, but there is no time limit. Try to get a high score! Written in Python.
A clone of the briefly-popular Flappy Bird mobile phone app.
Makes your screen flash. Has several minor bugs but they won't affect the programs; the next version will fix these and improve the UI.
Given a grid with squares of different colors, your goal is to flood the entire grid, starting in the upper left corner, with the same color within 25 steps.
Designed to monitor the pressure (at the junction) and the flow rates in the parallel ducts, when the flow control valve is closed. Calculates API oil density (lb/ft^3), viscosity [dynamic (cP) and kinematic (cS)] of oil by Beggs & Robinson, variations in flow rates (ft^3/s), velocity (ft/s), friction factors and Reynolds numbers in the ducts, when the valve is closed, the pressure variation (psig) at the junction points when the valve is closed, and the archive comes with an image of the arrangement of the pipes with the valve.
Statistics program, plotting fluctuations.
Shows how to change fonts programmatically.
Finds for the differential equation of a forced oscillation given as m*d2y/dt2 + d*dy/dt + c*y = 0*cos(omega*t) or m*d2y/dt2 + d*dy/dt + c*y = 0*sin(omega*t) or a combination of both the exact and approximate solution dependent on preset initial conditions t0, y0(t0), y'0(t0) and graphs the result.
This program finds the formula mass (in grams/mole) of any chemical compound typed into the calculator using standard symbolic notation for elements (e.g. "H", "Ca", "O", etc.).
This program finds the formula mass (in grams/mole) of any chemical compound typed into the calculator using standard symbolic notation for elements (e.g. "H", "Ca", "O", etc.). This improved version fixes some serious problems in the old version (
Plots a fractal to simulate a Julia Set. The program will ask for a sample graphing space with a border B. It will also ask for the number of points (G), which will determine the number of points plotted in the graph. The higher G is, the more detailed the fractal is; however, the plot will take longer to complete.
Finds by means of successive calculation the member forces S and their components Sx, Sy, Sz in a 2D- or 3D-truss.
Program designed to calculate the maximum unsupported length for pipelines in operation (distributed or concentrated load). Calculates the length between the supports as a function of the suggested vertical deflection. Only for tubes with SMYS from 35 ksi. Output information in English units.
Allows you to calculate Darcy's friction factor according to the equations of Swamee-Jain, Haaland, Chen and Colebrook-White. Includes comprehensive PDF documentation.
Some programs written for Fugasity utilizing PR, 2-TV, and LK also for mixtures as well as fugasity applied to Gibbs free energy.
Finds for a function f(x) of n-th degree ( n= 3 or 4 ) given as f(x) =*x^n + b*x^(n-1) + c*x^(n-2) + … the numerical values of the unknown coefficients a, b, c, … owing to preset conditions. These conditions may be: a given point P(x|y) as part of the graph of the function f(x), extremum or tangent in x for f´(x), point of inflexion in x as f´´(x)=- ( f´´(x)<>0 also possible ) - or the integral I (x) =nInt( f(x), x_lower, x_upper) between two points. After calculation, the graph F1(X) of the function is plotted.
The popular game of 2048, where you need to add the numbers in the squares to make powers of two.
Provides the ability to view PNG and JPG files natively and directly on the calculator. Supports zooming and panning, including using the touchscreen. For firmware 10077 or higher. 
You have 15 numbered squares in a grid, and you must slide them around to put them in order.
Solves coordinates for geocaching.
A collection of useful geodesy routines. Not for navigational use (estimated 14% error).
Converts between coordinates (UTM, sexagesimal or decimal degrees) of the WGS84 system to the corresponding coordinates (GAUSS-KRÜGER or degrees) in the POTSDAM system and vice versa, and finds the number of the German "Messtischblatt" including the marking of the 1/64 quadrant (8*8 subsquares).
How well do you know your world? Touchscreen game where you are given a location and you must touch the map as close as possible to the actual location.
This app is part of a tutorial of making custom user apps for the HP Prime. Notes of how the app is made, as well as an app itself, are included in the zip file. GeomCalc has ten geometric calculations: five areas and five volumes. Requires at least firmware 13333.
Converts UTM coordinates to geodetic coordinates and vice versa.
Calculates German bank holidays on the basis of Gauss's formula for Easter.
A simple goal shooting game. Just press left and right to move the player, ENTER to shoot, and ESC to quit.
A pair of programs. The first one displays both the number of Goldbach partitions, and a list containing them. The second one is an attempt to plot the Goldbach "Comet", which is a plot of the number of twin prime summands, for each positive even integer, (up to a users specified number, and within calculator limitations). The plotted cometary tail gets more interesting for large numbers, (like 500), taking a correspondingly longer time to present, naturally.
Powerful 3D graphing application. Includes rotation and tracing, with touchscreen gestures for rotation, zooming, and panning.
A gravity simulator. Press shift to create a planet, alpha to create a star, and EEX to create a black hole.
Implementation of hangman, where you must guess the word before the man is drawn.
Find the bee among the flowers.
Plots a hat.
Quickly draws a green hat in Python.
Find yourself in an unknown house, with no idea how you came or how to leave. Just a simple programming exercise in the style of old text adventures with small graphics. If you have to wait for about 30 min, you can play it to fill the time.
Play the card game of Hearts.
Solves the one-dimensional heat conduction equation by means of the Forward-Difference method, the Backward-Difference method and the Crank-Nicolson method.
Calculates three heat properties of liquid water based on its temperature: specific heat capacity of water (ratio of heat added or removed from an object to cause a temperature change), measured in J/(g*°C), latent heat of evaporation, measured in kJ/kg, and latent heat of fusion, measured in kJ/kg. The program accepts three measurements for liquid water, Fahrenheit (°F), Celsius (°C), or Kelvin (K).
A small utility that gets a color in Hex, RGB(0-255), HSB or RGB(0.0-1.0) and converts it to the other formats, including HSL. It has a graphical interface that supports touch input for tweaking the color in HSB, as well as tools for getting the complementary color and darker or lighter shades of the original. It also features a favorites palette, where you can store up to five colors for later use. The program has a dedicated Help section which covers the basics.
Based on the game High Performance #1, written for the 48. The screen is divided into 9 rectangular parts (3*3), and each digit (1-9) corresponds to a random combination of rectangle that will be blacked out. From a white screen, you have to blacken the 9 zones. To add to the challenge, if one or more areas of the screen are already blackened from the combination of the number played, they become white again.
Implements simple geometric solutions for spheres, taking no account of refraction. It includes functions for distance to horizon at a given height, and inverse functions.
A simple toolbox for the Prime, with a screen test and other functions.
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Library functions for the symbolic mode (CAS) of the Prime.
The classic text adventure game, Hunt the Wumpus, in Python ported to the HP Prime. HP Prime firmware with Python required.
Performs piping engineering (long ducts) calculations for the hydrostatic testing phase: the volume of water required to fill the test section (gal_US), the volume of water required for the pressure test (gal_US), and the amount of pressure change for a change in test water temperature (psig/ºF).
Implementation of "I Wanna Be The Guy". The parameters and graphics are almost the same as the original Windows game. However, many functions such as platforms are not included for performance reasons, and the collision contact is also not as well implemented as the original one.
Another simple Tetris implementation.
Creates Iterated Function System (IFS) Fractals with touch zoom in/out. There are 16 built-in definitions, plus users can store custom definitions in L0 to generate their own images.
Calculates the increase in the volumetric flow rate of a long duct using parallel piping (only for incompressible flow).
Type in a numerical value and change the area units with various conversions with units that end with "meter". Inspired by Bernard Michaud's "Power of Ten Graphical".
Does single and double interpolation.
Helps you interpolate or extrapolate values using the the equation of the line passing through two different points.
The classic Space Invaders game. Shoot the aliens before they shoot you.
Clone of the famous game Space Invaders, where you must shoot the aliens before they shoot you. Also includes a level editor and a sample level.
Given X and Y coordinate points of a closed area, the irregular polygon Area and C.G. are calculated. As with all of the author's spreadsheets, the blue text cells are the data input cells and the red text cells are the calculated output cells.
Changes the theme of the calculator.
Solves linear systems using the Jacobi and Gauss-Seidel Iterative Techniques. It also calculates the spectral radius of the iteration matrix.
CAS program that calculates the Jacobian of a matrix. Also can evaluate it at a certain point.
Number guessing game.
A collection of 144 colorful pictures to load onto your Prime to show off its power to your friends!
Another implementation of the Game of Life. Presently there are three pre-canned starting patterns and the app only renders the first 50 generations but it is a start..
Fly a rocket and try to go through as many checkpoints as possible. The longer you survive, the more points you get. A rough port of a TI-84 Plus CE game.
Inspired by the Mandelbrot generator, this has been modified to display the Julia set.
A touchscreen keypad with support for alphabetic, numeric, and special characters. Responds to calculator color theme settings and language settings. When set to German, French, Spanish or Portuguese, a long-press on certain keys will reveal accent characters.
A numeric touchscreen keypad.
Similar to Fruit Ninja. Use your mouse to operate. Red circles are bombs, so you should avoid cutting them.
Returns the interpolating Lagrange polynomial of minimum degree k for a set of points {x0, x1, …, xn}, {y0, y1, …, yn}, where 1 <= n-1 and n = 2, and depicts the plot of the function.
Card game of Landlord.
Allows you to perform Polynomial Regression and Multiple Linear Regression using the Least Squares technique.
Calculates the value of a resistor R to power an LED. Data entered are the voltage V of the power supply you intend to use (for example, 12 V), the forward voltage Vf of the LED (for example, 3.3 V), and the forward current If of the LED (for example, 0.02 A or 20 mA). In this case, the program will return RC5 ohms. The next commercial value is 470 ohms.
Calculates how many payments are required to finish a loan, given a certain annual interest rate and payment. Payments are assumed to be monthly, and end of period. The program will also return the last payment. Due to the rounding in the financial algorithms, the last payment is an approximate (unless the interest rate is 0%).
Diagram of the spectrum of visible light.
Game where you must turn out all the lights.
Creates Lindenmayer fractals. Many options of fractal types including Harter-Heighway, Hilbert, Koch, Lévy, Minkowski, and more, and once drawn allows you to add iterations and rotate the direction. Written in Python.
Uses the Lindenmayer System to build fractals on screen, with 28 Lindenmayer fractals. May only work with older ROM versions.
Attempts to fit bivariate data to the curve y = a + b * x + c * e^x. The LSQ (least square) function is used. The output is a list of three matrices.
Linear solver app similar to the LSX program, in that it can also solve Complex Linear Equations in 2x2 and 3x3. Useful for those in the Electrical/Electronics field.
Intersection and tangent points are determined for lines and circles. Also, circle center and radius are determined for three points. The row number for each type of problem is shown at the top of the spreadsheet. As with all of the author's spreadsheets, the blue text cells are the data input cells and the red text cells are the calculated output cells.
Simulates a lock screen where you must enter a pattern to unlock, similar to what Android has.
Illustrates the Moon, the Earth, the Moon's orbit around the Earth, and animates the light-distance of the Moon from the Earth.
The lunar lander is 500 ft above the moon with a downward velocity of 50 ft/s and has 120 units of fuel. The height, velocity, and remaining fuel are displayed. The program will pause for up to 60 seconds. Enter the number of units of fuel you wish to burn during the next second, then press the Enter key. The new height, velocity and remaining fuel are displayed. The maximum amount of fuel you can burn at one time is 30 units. Adapted from the Rocket program in Basic Computer Games, MicroComputer Edition, 1978 by David H. Ahl.
The lunar lander is 120 miles above the moon with a downward velocity of 3600 mph and has 16,000 pounds of fuel. The time, height, velocity, and remaining fuel are displayed. Enter the number of pounds of fuel (0, or between 8 and 200) you wish to burn per second during the next 10 seconds, then press the Enter key. The new height, velocity and remaining fuel are displayed, as well as a graph of the descent. The maximum amount of fuel you can burn at one time is 30 units. Adapted from Jim Storer's 1969 Lunar Lander simulator program that was written in FOCAL-69.
A bean machine to demonstrate the central limit theorem.
An adventure game where you must explore a tower, fight enemies, collect keys, and buy powerups.
The classic Chinese adventure game Magic Tower, where you must explore a 50-level tower, fight enemies, collect keys, and buy powerups. For a calculator game, this game is very intricate, challenging and fun. Well worth the time to defeat Zeno! Includes both the original version, with most text in Chinese, and an English translated version. Updated to work with (and also require) the April 2023 (or later) firmware.
Shows a magnifying glass which help you to see individual pixels better. You can start it using Shift-USER M in every program. Contains full source code with detailed comments, which demonstrates mask operations with GROBs (DIMGROB_P, GROBW_P, GROB_H, BLIT_P, loading of PNGs to G1-G9).
This is a very basic and straight forward approach to programming the Mandelbrot set on the Prime. It just shows how programming and using complex numbers/variables in a program work on the Prime. It is in no way optimized for speed, neither mathematically nor in terms of implementation. Also, it's not a Prime App (thus not using the Symb/Plot/Num and their Setup keys) and has no interactivity (like zooming) at all. The area of the Mandelbrot set is defined by setting the corresponding variables in the source code. Take it as a starting point for your further explorations, be it in Prime programming or in math. And feel free to expand it and maybe make an App out of it with interactivity.
A small collection of three programs made for drawing parts of the Mandelbrot fractal on the calculator screen in either black/white, grayscale or color. The center point (focus) and zoom level, among other settings, can be changed by the user in the code. An image can take a short while to draw, but the end result will be worth it in many cases. Includes two sets of example coordinates.
Fast explorer of the Mandelbrot fractal written in Python. Lets you change color scheme and zoom in.
Well-done implementation of the famous code-breaking game. Each code peg can be one of 6 colors or vacant if you choose that option. When you submit your guess, black and white key pegs will provide
feedback.
Numeric math application with functions for bisection, fixed point, Newton-Raphson, and more.
Generates some images mathematically, including Blue Diamond, Lake, Tree Trunk, and Yin Yang on the Prime, as well as Cat, Dog, Pisces, and Question Block on the 42S.
Programs to create an n by n matrix based on the elements of a given list. Each row has each of the elements rotated one element, either left (LSM) or right (RSM).
Calculates four calculation points and three parameters of A, γ, and β of the Incomplete Gamma Law: g(x) = 1 / (β^γ * gamma(γ)) * x^(γ - 1) * e^(x/β).
A 3D game where you need to eat 3 red diamonds and then eat the cyan diamond to win. Press alpha to step forward and shift to go backward, and use the touchscreen to look around.
A maze game written in Python with a 2D map and a 3D-like view.
A little memory game, where the numbers 1 to 9 appear on the screen and are hidden by rectangles.
Displays the Program -> Edit -> Cmds tree without needing to edit a program. Adopt 'menuList' for your own custom menu; remove 'menuList' from the code when you want to use different menus in different apps.
Calculates the course direction and distance in miles given two pairs of latitude (north/south) and longitude (east/west).
Solves numeric methods. Uses the Newton-Raphson method, the fixed point method, the Newton bisection method, the secant method, and the false position method. Shows the intermediate steps and the final result.
Implementation of the Minehunt game from the 48 series.
A 2D Minecraft game, though still early in the development process.
A fairly faithful version of the classic Minesweeper game, where you must clear all spaces without mines.
Clone of the popular puzzle game found on most older versions of Windows. Drag on the touchscreen to move the cursor, press [ENTER] to left-click, and press [DEL] to right-click.
Faithful touch-based implementation of the mine hunting game.
Calculates the minima and maxima of a function using Lagrange Multipliers.
Shows RGB gradients to test the screen's abilities.
CAS program that solves an equation using the Modified Newton-Raphson Iterative Technique.
Calculates and draws the vibration mode shapes for a lumped MDOF elastic system.
A simple game where the machine randomizes between $250 to $50,000. Press [Enter] whenever you feel lucky.
Simulates the famous Monty Hall program. You get to choose how many times the problem should run, the number of doors and if you want to change doors or not. It only shows the results (statistics) and you won't actually choose doors, or win a car or goats.
Determines when the next start point of a desired phase of the Earth's moon will occur given a month and year.
Calculates moon phase for a given date and then displays it adding some random speckles. Detailed instructions on how to install and use in English and Spanish.
Simple game where the objective is to collect dollar signs (coins) to unlock the boundary at the top of the screen to allow access to the goal. Trees block your progress. Avoid the purple foes at all times, one touch and it's over! One purple foe jumps around randomly while two fly horizontal.
A curvefit model for "average" population 1 main sequence stars. User enters the star's mass, all other parameters are calculated and displayed.
Displays all functions in the CAS/Rewrite menu with their results in a popup menu on the CAS main screen. Additionally, it displays expand, proot (in second menu only), collect, and lncollect functions and their results.
Generates random colors or defined or randomly defined tone of colors by sections defined by users. You can divide the screen into something as 36*24, 4*4...with a maximum of 320*240. Please wait for updates that will allow you to touch the screen and return the displayed colors in RGB or HEX form.
Expands the build-in Demo_Tetrahedron by named axis, surrounding box, angle value and rotation vector display. You can rotate the Z axis with left/right, rotate horizontal/vertically by screen swipe, and quit with ESC.
Program for the area of piping engineering, construction and assembly of pipelines. Calculates the smallest natural bending radius that can be used without excessive stress. Calculates the radius (ft); the angle in decimal degrees; and the angle in degrees, minutes and seconds.
This is a very basic basketball shooting game based on angle/velocity input. With animation.
Program for carbon steel pipelines in a range of nominal diameters from 4 in to 32 in. Designed to calculate the thickness of the concrete coating to negative buoyancy in pipelines.
CAS program which solves nonlinear systems using the Newton Method. It also calculates the Jacobian matrix of the system of equations.
Numeric methods by the Newton-Raphson method. Three version, for a direct result, a step-by-step result, and a version in a table similar to Excel.
Determines whether a number between 0 and 10E9 is prime. Gives the prime numbers before and after that number.
Statistics program, where you enter the standard deviation and a guess.
Approximates the definite integral for a given function using the Newton-Cotes Formulas (Trapezoidal Rule, Simpson 1/3 Rule and Simpson 3/8 Rule) and Gauss-Legendre Quadrature.
Uses numeric methods to solve an equation in the form f(x) =. The iteration table is also shown. You can choose between five different numerical methods: Fixed-Point Method, Newton-Raphson Method, Secant Method, False-Position Method and Bisection Method.
OOP API Nabla is an adaptation of the object-oriented programming paradigm. It includes functionalities such as defining attributes, functions, inheritance and polymorphism. It is compatible with your programming style as its functionalities are executed independently.
Program for piping or hydraulic engineering, designed to calculate the volumetric flow through up to 3 types of flow meters by obstruction (orifice plate, nozzle and Venturi). The program calculates the Reynolds number and the flow velocity in the tube, the pressure drop, the discharge coefficient (with the exception of the Venturi meter) and the volumetric flow through the discharge orifice.
Available in 3 versions: Brazilian Portuguese with SI units, English version with SI units, and English version with English units.
Accepts as input the elements for a heliocentric elliptical or hyperbolic orbit, and a time of interest. The user inputs data by adjusting the values within the code. OE2PV outputs heliocentric state vectors for the object and for Earth, and it further outputs the geocentric distance, right ascension, and declination for the object.
Calculates the normal depth of a parabolic channel in the form of y = Cx^2, where C is the x^2 coefficient or curvature coefficient. The channel depth and width or any other known depth and width must be entered to describe the curvature of the parabola. Enter any three of the four variables (flow rate, depth, slope, and n) and solve for the fourth variable. The wetted perimeter P is calculated using the exact formula per Chow as redefined by Merkley. Includes comprehensive PDF documentation.
Allows various calculations on topics such as humidity, cooling towards, and adsorption.
Massage the possum to repel aliens from outer space! Inspired from some opossum massage video on Youtube. Originally released in April 2016 for the TI-84 Plus C Silver Edition, TI-Nspire CX, Windows and Android. Opossums are said to have good alien repelling capabilities, but to be able to do so they must be happy. On the eve of an alien invasion, you are thus sent the unholy task of massaging an opossum to send them back into space!
A preliminary orbit determination code. By editing the code, the user enters position data for Earth and directional data for another object orbiting the sun at four distinct instants of observation. The program calculates the elements of the object's heliocentric orbit.
Program for the area of piping engineering, made to calculate the hole diameter of an orifice plate.
Works for liquids, gas and steam.
A word processor which should be compatible with most driverless USB keyboards. Requires 
Tiling a Rectangle 5xN by Pentominoes. Seeks solutions (and registers in a spreadsheet), displays solutions, and rebuilds a specified solution.
Performs common calculations related to putting up a Christmas tree.
Determines three characteristics of a conic section: the eccentricity, perigee, and apogee, given the lengths of the semi-major axis (A) and the semi-minor axis (P).
A simple keyboard-controlled periodic table of the elements. PDF documentation.
Extended Euclidean algorithm program.
Library of physical constants.
A large menu driven system with many formulas and diagrams for physics and electronics, including Karnaugh maps, resistor calculations, Zener diodes, and more.
This pipe calculator program calculates the unknown variable for Manning, Colebrook-White, Continuity (Q=), Area, Critical Flow, and shear stress equations for a circular pipe flowing partially full. The program uses the calculator’s unit functions, so the user must select the unit of the solve variable. The results are displayed on the calculator’s print terminal. To switch between programs, select the new program from the Menu on the INPUT screen and press the OK tab. To rerun the same program, press the Esc key to exit the terminal, and press the Enter key to rerun the program. Includes PDF documentation.
Calculate N, Q, S, Dia, or y/D for partially full pipes using Manning's Equation in English or Metric units. The program also computes the corresponding velocity. The depth of flow ratio, y/D, is solved by numerical analysis using the secant method. Where there are two solutions, only the first solution between 0 < y/D < 0.9381 is reported. When solving for the diameter, the calculated diameter and diameter rounded to a standard size are given. This program is a conversion of an old FORTRAN program that was printed in Schaum’s Solved Problems in Fluid Mechanics & Hydraulics, 1989.
Calculates the weight of the piping in the international system (kgf/m) and english units (lbf/ft).
Program for the piping area, designed to calculate the volume leaked and the leak time through a crack, due to the depressurization of the pipeline. Only for incompressible flow in long carbon steel ducts with nominal diameters between 4 and 32 in. It has the option to choose up to 7 types of fluid (water, salt water, oil, ethanol, gasoline, kerosene and crude oil). In the raw oil option, it has the choice of an API degree from 10 to 44, and a temperature from 41ºF to 149ºF.
Useful short program to calculate piping loop dimension to reduce stress in the pipeline. Here you can find the base version; eventually there will be a more user-friendly version.
Thermal expansion is a simple program to calculate the pipe expansion due thermal action. This program include also the force and pressure on the pipe supports. Very useful during the stress analysis calculation and during piping design.
Calculates the pitch and angle of various roof heights. The pitch of a roof is the number of inches of vertical rise per 12 inches. For example: a roof of 3/12 is pitch is a roof that rises 3 inches for every 12 horizontal inches. This program demonstrates the angle computer given different roof pitches. You control the rise, anywhere for 0.5 ft to 12 ft. Use the up and down arrow keys to control the rise.
Code that solves the Planck integral for radiant flux in watts per square meter, given a temperature in Kelvins, between a lower wavelength and an upper wavelength, with an option to calculate the luminous power of a sphere of input radius.
From the field of Vector Algebra, finds for two planes, plane and straight line or plane and point typical properties like distance, point or line of intersection, angle between two planes.
Similar to the popular phone game, where you control the plants and must protect the garden from zombies.
Calculates the time-to-fall in a plunge orbit (eccentricity=. The zip file contains two programs. PLUNGE1 requires input values for the initial separation where two objects are at mutual rest, and for the separation between those same objects at two subsequent times prior to contact. The code calculates the amount of time to fall from the initial separation to each of the subsequent positions, and then it calculates the time difference; i.e. the amount of time to fall from the first subsequent position to the second subsequent position. PLUNGE2 requires input values for an observed separation and for an observed radial velocity (in approach) for that separation, and for a final separation. The initial distance is calculated using the Vis Viva equation. Then the amount of time required to fall from the initial separation to the observed separation is calculated. Next, the amount of time required to fall from the initial separation to the final separation is calculated. Finally the time difference required to fall from the observed position to the final position is found by subtraction.
Given a point (xP|yP) outside a curve described by f(x), this CAS program finds one or more tangent(s) Ti(x) through (xP|yP) to the curve, the accompanying tangential point(s) (xT|yT) on f(x) and the normal line(s) Ni(x) in (xT|yT).
Database of statistics, types, sizes, categories, sprites, names, categories, descriptions, typings, and more, for Pokémon characters.
Poker game.
Demo version of a program to perform calculations to determine the required embedment depth for free standing poles embedded in earth or concrete which are subjected to lateral and axial loading conditions. Both laterally constrained and unconstrained conditions can be analyzed, as well as isolated and non-isolated poles. The User inputs the physical characteristics of the pole, soil properties and lateral and axial loads and the program calculates required pole embedment depth. The program will analyze both round and rectangular shaped poles, multiple concentrated and full or partially distributed uniform lateral loads located at User specified points above the pole base. The User can also specify if the lateral loads are due to seismic or wind. Up to two additional axial loads can also be specified. In this demo version, only one lateral load can be specified, and allowable lateral soil bearing pressure is set to 100 psf/ft.
Finds for any polygonal cross-section with gaps of circle areas the main section properties, draws the plot of the contour and computes for any load combination of N, My, Mz the stresses in all input points. Furthermore the intersection points of neutral axis ( Sigma = ) and contour of the polygon are calculated.
Performs circuit analysis of polyphase/balanced three-phase circuits. Includes PDF documentation.
Solves polynomials.
A pong game. You can play against a second player or against the calculator. There are four different styles available, including retro and modern.
The famous PONG game, now available on the Prime. Features: 3 modes (1 Player, 2 Players, and demo), 3 difficulty levels (beginner, intermediate, expert), and black and white graphics for the real retro feeling.
Very simple program to convert Power of Ten units.
Modified version of 
Calculates loss of load, volumetric flow, and diameter.
Examples of the solver commands from Xcas for the Prime
Extended raycasting engine.
A versatile paint app with many functions like a large canvas, different brushes, geometric shapes, text, filling and much more.
A drawing program with a friendly GUI.
Program to search inside current program text, all programs, current note text, and all notes. May have issues on the G2.
Saves the current version of a program while editing it, using user keys. Restores saved version (UNDO changes). Second call also allows to rollback UNDO operation (REDO).
Drop down menus you can use, in the "Connectivity Kit Editor", as opposed to programming directly from the calculator itself. They contain a variety of commands, Greek symbols, and "Math" menu.
Mechanical engineering program. Works with thermodynamic properties of air and interpolation and some other things.
Advanced periodic table based on the Touch Periodic Table of Elements. Full source code included, extensive documentation, and English and German versions.
Vapor pressure equations program for the Thermodynamics course. Contains the HENDRIK equation equation and 2 ANTOINE equations.
Emulates the HP-41CX, with 320 memory registers, full XMEM (except with ED), Helios printer support, and partial timer support. Written in Python, requiring a recent firmware update.
A Pythagorean triple is a trio of positive integers a, b, and c, that describe the lengths of a right triangle, where a and b are the lengths of the sides while c is the length of the hypotenuse. This program asks you for m and n and generates a Pythagorean triple. Make sure that m > n.
Performs calculations related to the refrigerants R134a and R22.
Determines the population of rabbits and foxes over time as modeled by the differential equations dr/dt = 2 * r - α * r * f and df/dt = -f + α * r * f. Includes two versions, one which gives numerical results and one which plots the results.
Outrun style racing game, with amazing graphics, just like the old Sega game.
Looks similar to Sokoban but is actually fairly different. There are four kinds of objects: blue cold waste (after pushing it, it will roll until it hits a barrier), red warm waste (comes from a combination of two or more cold waste and cannot be moved), animated red critical mass waste (cold waste or warm waste can change into critical mass when it touches the critical mass), and boxes (you can push them and they will not roll).
Generates a list of the requested number of random numbers with the numbers in the specified range. Has functions to also exclude specific numbers, include specific numbers, or generate only numbers from a given list.
Determines the optical parameters and quality of a doublet lens for astronomical refractors - RC index parameters from one or two known glasses. If you know one lens material, you can use the simple method (RCindex_universal), or if you know both lenses (RCindex_2_lenses), you can enter refractive indexes from the glass catalogue of manufacturers such as Ohara, Schott and others. The program determines lenses such as Achromat, semi Apochromat or Apochromat and their parameters.
Calculates ephemeris in real time. In Indonesian.
Calculates on the basis of Eurocode 2 the tension reinforcement and, if required, the reinforcement in the compression zone of a concrete beam with given geometry, quality of concrete and loads M,Ed and N,Ed. Afterwards the calculation for a shear force V,Ed is performed. Documentation in German.
Program to calculate the income of 5th category Perú-2019.
Program for calculation of the distribution of profits of a company with the factor of days worked, and factor of remuneration.
Calculates the current limiting resistor for a given number of LED diodes in series.
Enter the colors of a resistor, and the resistance is calculated.
A simple but effective resistor color coding app. Supports both 4 and 5 band resistors.
Calculates the condensed stiffness matrix and the general matrix for a typical framing system, assuming all elements are fully flexible.
Calculates the global stiffness matrix of a system whose elements are completely flexible.
An app that allows determining the resistance parameters of the rock mass, according to the Generalized Hoek-Brown failure criterion.
Shows how to rotate graphics objects, useful for rotating text within a program, including sample code of how to use it.
An early alpha release of a full RPL environment that runs on the Prime. The goal is to emulate the RPL functionality of the 48/49/50, while reusing as much of the existing Prime environment as possible.
Offers 47 equations for HP Prime's Solver App. Just run the eqlib program, select the category that you are interested in, and select the equation within that category and you are off and running. Categories include: Geometry (areas, volumes, surface areas), Finance (monthly loans, sales tax, break-even), Temperature Conversion (Fahrenheit to and from Celsius), Physics: Problems of Motion (linear distance, circular motion, pendulums, terminal & escape velocity), Sound (speed of sound, Doppler effect, loudness), Optics (Lens and Snell equations, spherical refraction), Electronics (2 resistors series and parallel, thermal noise, Ohm's Law), Astronomy (parallax, luminosity, Kepler's 3rd Law, time dilation), Great Circle Calculations, Angle of Incidence Calculations, Gases (Ideal and Boyle's Gas Laws, heat capacity, air density, isothermal expansion), and Fluids (depth pressure, fluid flow, Bernoulli's Equation).
RPN Calculator app designed for typical math operations and optimized for survey calculations with angle, distance, area and volume unit support, as well as 2D/3D vectors. Converting between units is simple, and results can be stored in variables for later use. Now has a FIF menu which was inspired by the FIF49 app for HP 49/50 for working with feet-inches-fractions dimensions.
Four CAS functions that solve ordinary differential (system of) equations using the following methods: Euler method, Heun Method (also known as Modified Euler method), third-order Runge-Kutta method and fourth-order Runge-Kutta method.
Clear the board by selecting groups of adjacent circles of the same color. The points for a group increase with its size.
Computes the scattering matrix S-parameters, the stability and noise circles of simple RF-circuits.
SCHIP emulator, including Pong, Space Invaders and Tetris ROMs as samples. Some games don't work as expected, but it should play many CHIP and SCHIP games.
A Screen Capture utility that saves your calculator screen as a PNG file to the app's Files folder. Uses a user key definition to accomplish the task from most calculator screens. Includes a File Manager to delete and view existing screen captures.
Program for calculating the area, center of gravity, moments of inertia and main angle of composite geometric figures.
Calculates some geometric properties for figures made from rectangles, like W section or so.
Demo version of a program that performs calculations to determine the structural properties of typical shapes. The user inputs the physical dimensions for a selected shape and the program calculates the following properties for both the X-X and Y-Y orthogonal axes: Area, Centroid Depth, Moment of Inertia, Elastic Section Modulus, Plastic Section Modulus, Radius of Gyration, Torsional Constant and Shape Factor. Analyzes I-Shaped, Solid Rectangular and Circular and Solid Rectangular and Circular Tube sections. The paid version of the program adds Angle, Built-Up Girder with Web and Flange Plates, Channel, Symmetrical I-Shaped Girder, Unsymmetrical I-Shaped Girder, Solid Rectangle, Solid Round Bar, Rectangular Tube (HSS), Circular Tube (HSS), Tee and Zee Sections. LT Version will analyze I-Shaped, Solid Rectangular and Circular and Solid Rectangular and Circular Tube sections.
Calculates both series and parallel impedance, and allows you to accumulate resistors by building on prior calculations.
A program to make it easy to set the auto shutoff period, using a slider. Also includes a slightly newer version without the slider.
Draws a space shuttle. Vector data was converted from an old AutoCAD DWG file.
Sierpinski's triangle generator.
Shows a miniature version of the famous Sieve of Eratosthenes. The Sieve of Eratosthenes is a Greek algorithm that determines prime numbers from 2 to N through eliminating multiplies.
Implementation of Simon Says, where you must repeat the pattern shown to you.
Various separate programs to perform some engineering calculations, for Strength of Materials, including Second Moment of Inertia, Common Dimensions, Complex Stress Systems Calculation, Equivalent Torque and Moment, Moment Calculation, Rosettes, Thinwalled Pressure Vessel, and more.
Linear programming by the Simplex 2 phase method.
Solves linear programs using the simplex method, providing a pure integer solution, or a mixed integer, continuous and binary solution. Lets you save and reload data, set target Z value, import data from spreadsheet, and use user definable variable names.
Using Simpson's Rule, approximates the integral of f(X): ∫f(X)dX=h/2*(f(a)+2*Σf(x_E)+4*∑f(x_O)+f(b)) where a is the lower limit, b is the upper limit, n is the number of intervals and is even, h is (b–a)/n, x_E is a+h*I where I is from 1 to n-1 and I is even, and x_O is a+h*I where I is from 1 to n-1 and I is odd.
Probability simulator, letting you flip coins, roll a 6-sided die, spin a 4-numbered/colored spinner, take a colored ball out of an urn, deal 5 cards, or get random numbers.
Simultaneous linear equation solver which solves 2x2 and 3x3 equations in Real and Complex mode. Mimics HP Linear Solve App, with Inputs and Outputs on the same screen. To return to Menu: Check Menu[] box and [Ok].
Calculates for a single-span girder with any number of sections and elastic restraints or external moments at the supports the support reactions, end moments and maximum field moment including its location. Each section may have a trapezoidal load and a point load at the right end. Furthermore the shear force and the internal moment for any point of the beam can be calculated.
A 2D open world game similar to Minecraft. You can explore an infinite world with varying terrain, build with different kinds of blocks, dig into the ground, and shoot enemies.
Event driven framework for applications.
SkeletonDemo is a fancy demo app for the event driven framework SkeletonApp. It tries to visualize the concept behind the framework.
A method for combining experimental results. The idea is this: if we "trust" the values and error bars reported by the various experimenters, the usual recipe for computing a weighted average and overall error bar is fine. But if the error bars are inflated or deflated (intentional or unintentional), the Bayesian approach allows for some "slop" in the error bars and finds optimal agreement between the experiments. For instance, if one experiment reports a value with small error bars that is quite different from other experiments, the usual weighted average calculation will be dominated by that "rogue" experiment. This does not happen with the Bayesian (SKEPTIC) recipe.
Simple sliding panels game.
Slider game, where the object of the game is to put the tiles back in proper numeric order.
A game where you slide a box around on a square graphic.
Helps you to find the distance, the slope and the equation between two points, the perpendicular distance between a point and a straight line, collinearity of three points (the middle-point and the end-point coordinates), the equation of a straight line that goes through a point with a slope, transforms linear equations back and forth between standard and slope-intercept forms, generates the coordinate representation of a straight line, determines whether two straight lines are parallel or perpendicular, finds the (x) & (y) intercepts of a straight line, finds the intersection point of 2 straight lines, transforms a non-standard form equation into a standardized form of it, divide a segment into points or sub-segments, performs linear interpolation/extrapolation. Requires firmware 10077 or higher.
Displays a Smith chart and if you tap a point will display many of the relevant data about that point, including Z, X, Gamma, Return Loss, VSWR and Q. Modified to be an app that expands to fill the display, inverting the cursor, and more. Gives the usual Smith chart results just by clicking on the chart. Also, up to 3 parameters can be clicked to select colors and when "Gradient" is clicked, the gradients in the selected colors are plotted. Much faster than the previous version.
Recreation of the classic Snake game, where you eat dots and grow bigger, while trying not to run into yourself.
Tracks the balls and scoring when playing snooker.
Computes for a rectangular foundation submitted to vertical loads N and moments My and Mz the soil pressure for all points of the contour in consideration of a open gap (no tension possible in the gap). The automatic consideration of the own weight is provided. A plot of the area of pressure is depicted after calculation.
Push the blocks into their storage locations without getting stuck by a wall. Lots of fun, and many levels. Now has some improvements: made compatible with the Prime G2 and the latest firmware, keys control support in addition to touch control, best scores history, last move undo, and other bug fixes.
Push the blocks into their storage locations without getting stuck by a wall. Lots of fun, and many levels. Now has some improvements: made compatible with the Prime G2 and the latest firmware, keys control support in addition to touch control, best scores history, last move undo, and other bug fixes. This is an alternative fork of the game.
Solitaire game. Build up suits top left to win. Touch a card to pick it, then tap a destination to move it. Cards can only be moved onto the same suit and in sequence.
Solves systems of non-linear equations. Equations are used in a form where the result should be zero. Nelder Mead Optimization is used to find a minimum of the sum of squared results. If the minimum is zero, the solution is found.
Intended to replicate and combine programs from the HP 48 series of calculators for organizing equations and launching an equation solver. This app attempts to allow users to build their own equations library. The user can then also launch a numerical solver. This app implements the Newton-Raphson algorithm for solving a system of equations. In order to handle ill-conditioned, over-determined, under-determined, rank-deficient (etc.) Jacobian matrices, the SVD is used to determine the pseudo-inverse of the Jacobian (the pseudo-inverse coincides with the regular inverse of a matrix for non-singular matrices). Includes a copy of the equation library from the HP 48/49 series to get you started, including all the graphics. Also includes a more accurate version that requires 
Solves quadratic equations in a step-by-step fashion. Requires 
Performs symbolic time to frequency and frequency to time calculations: calculates for a given symbolic f(t) Fourier, Laplace and Z-transformation in symbolic form, draws the complex Laplace function together with the Fourier transformation slice as a 3D plot, and calculates for a given frequency transfer function the unity pulse, dirac pulse response and bode magnitude and phase in symbolic form. Includes PDF documentation.
Does spectrum analysis using a Fourier transform.
Card game of Spider solitaire.
Calculates for a one-field beam with modulus of elasticity E and moment of inertia I the equivalent spring constants (vertical spring c,v and rotational spring c,phi) at any point of the beam's length L. Different kinds of support conditions are provided.
Calculates the standard flow rate of a pipeline using 9 calculation models (Theoretic, Weimouth, Panhandle-A, Panhandle-B, IGT, Mueller, Fritzsche, AGA-A, AGA-B). The listed calculation models are specific for flowing real gases in long ducts under approximately constant temperature (Real Fluid Isothermal Flow). Models include the gravitational energy term, allowing better results for ducts through mountain regions.
The beginning of an implementation of an adventure game, but never finished. Maybe somebody would like to finish it, or at least look at the source code for inspiration.
Some kind of steam calculation application with vapor tables.
From the field of Vector Algebra, finds for two straight lines L1 and L2 the distance between the lines, the points P1 and P2 of minimal distance on both lines, the intersection angle and checks, whether the lines are parallel, skew or have a common point of intersection. If the direction vector of L2 is entered as [0], the problem is handled as straight line L1 and point P. In this case the program finds the distance, the base point of perpendicular Pn, perpendicular vector P_ and the reflected point P0'.
Calculates the depth of flow in a composite gutter section using Manning’s equation modified for shallow or sheet flow using the HEC 22 (August 2013) equation that describes Q in terms of Sx, S, and T and not the equivalent equation that described Q in terms of Z, S, and d. Program assumes: (1) the curb face is vertical, (2) friction on the curb face is ignored, and (3) flow is contained in the street and gutter section, even if the water depth is above the height of the curb.
Program in the area of piping engineering, designed to calculate the force that an anchor block must withstand in the buried/air transition or the requirements for the transition to take place without an anchor block (transition length).
Program for the piping area, designed to calculate Fanno's flow properties (adiabatic duct flow with friction): stagnant properties; critical properties; input and output properties; and reduced mass flow rate when flow is blocked at outlet. Units of measurement in the International System. Note: Only for subsonic match number at the entrance.
This is a Sudoku editor/solver for the HP Prime. The GUI is a bit rough, but serviceable. Allows you to select the grid size (4x4, 9x9, or 16x16), clear the grid, and solve the problem, showing trivial hints. Includes some demo problems.
Sudoku solving program that uses the brute force method of solving sudokus and employs recursion. Written in Python.
Does calculations related to summations and series.
A set of tools for working with Sudoku, allowing you to play the game, solve the game, or make the game.
Given a positive integer n, it can be possible to find two non-negative integers x and y such that n = x^2 + y^2. This program uses iterations to find all possible pairs which fit n = x^2 + y^2. Some integers do not have representations, others have more than one. The program will show all possible combinations.
A simple side-scrolling platformer/tunnel hybrid where you control a bouncing ball, guiding it to the end of each level. Challenge lies in getting through narrow areas or climbing stuff without bouncing back, and it gets progressively harder to do so as the game progresses. The game features physics, randomized levels, animated graphics, multiple themes to make the game look different, smooth scrolling and parallax backgrounds. Try to get as far as possible as fast as you can without running out of time to get the highest score! For speed reasons, a G2 HP Prime is recommended.
Calculates the following properties for adiabatic duct flow with friction (Fannow flow): stagnation, critical, inlet and outlet duct with mass flow, update of incoming Match number for blocked duct at the entrance, reduced mass flow rate for the blocked duct at the inlet. Also calculates flow into a duct under permanent, adiabatic, and unidimensional flow, perfect gas with constant area, axle work and potential energy negligible, and wall friction related to Darcy-Weisbach's equation.
Finds the solution to a system of two dífferential equations given as d(y1)/dx =*y1 + b*y2 + f(x) and d(y2)/dx =*y1 + d*y2 +g(x). For initial values x0, y1(x0), y2(x0) the constants of integration are calculated. A graph of both functions y1, y2 is provided.
An interactive graphics alternative to the terminal screen in order to show any text content on multiple pages from a program, with support for line breaking, coloring and different font sizes.
T-Rex game modeled after the one in Google Chrome. Now fixed to run on the current firmware version.
Air Properties Program, with variables such as temperature, enthalpy, relative pressure, internal energy, relative volume, and entropy. Only 1 input parameter is necessary.
Tables for Isentropic Flow, Shockwaves, Fanno Flow and Rayleigh Flow, given the Mach number. Includes PDF documentation.
Finds the thermodynamic properties of R134a refrigerant by calculating pressure, temperature, specific volume, internal energy, enthalpy, and entropy
This CAS program finds the normal (or perpendicular) line N(x) through a given point (xN,yN) to the curve of a given function f(x) and additionally computes the tangent in the common intersection point (xT,yT) of curve and N(x).
Program designed to calculate the emptying time of a reservoir (constant section, inverted cone or spherical) with a free surface exposed to the atmosphere, using an orifice or horizontal tube of length L, diameter D and an outlet also exposed to the atmosphere. Conditions are non-stationary flow (discharge velocity varies with height of liquid in reservoir) and incompressible (liquids only) with loss of head in discharge piping. The user can choose up to 10 types of fluids for calculation. Ex: fresh water, salt water, motor oil, gasoline, ethanol and kerosene.
Calculates the quantity of diluted asphalt or emulsion using the tray methodology in liters per square meter.
Manages alternate user keyboards, with 6 editable profiles to modify the functions of the calculator keys.
Simple implementation of the Tetris falling shapes game.
Another Tetris implementation.
Simulates the Showcase Showdown round of the game show The Price Is Right. The wheel consists of amounts from 5 cents to 1 dollar in increments of 5 cents. The goal is to get closest to $1.00 without going over. On the game show, the winner of the Showcase Showdown advances to the final Showcase round.
Two trains are heading towards each other, on their own separate train track. Each train has going at their own speed (velocity). The trains start out a distance apart. This program calculates when and where the trains will cross over the same spot.
Takes from all of the HP Prime periodic tables available until now, and implements an all brand-new dark mode to be easier on the eyes.
This is a port of "The Valley" game to the Prime. The original version was printed as a program listing in the April 1982 edition of Computing Today magazine for the Commodore PET.
Allows you to calculate the fugacity from a single component (pure) or mixture, using any of the following state equations: "virial", "Van der Waals", "Redlich-Kwong", "Redlich-Kwong-Soave", "Peng-Robinson". Also allows you to calculate the activity coefficient, using "Margules", "Van Laar", "Wilson", "UNIQUAC", "UNIFAC". ("Infinite dilution activity coefficients" method).
Solves cubic equations of state, calculates residual properties and fugacity coefficients for a single specimen or a mixture; optionally, you can enter the binary interaction parameters Kij.. The app also includes spreadsheets for the Virial equation of state and four functions to calculate MCPH, ICPH, MCPS and ICPS.
Simulates rolling two six-sided dice.
Simple Tic Tac Toe game.
The developer wanted to learn about the miniMax algorithm, so he wrote this tic-tac-toe game and implemented miniMax so you could play a game against your Prime, with a full touch screen interface. It checks through 7! (5040) possible moves to make its move.
A simple time calculator to add or subtract time in a 24 hour clock.
Program for topographic calculation with tools of data collector, calculation of coordinates, areas, courses, intersections, plotting, generation of DXF, import and export of points, and more.
Several mining math tools for calculating topography, including the 2D planimetric method (entering the initial and final coordinates in 2D, or the initial coordinate and azimuth and distance) and the 3D tachimetric method (for the azimuth, course, vertical angle, horizontal angle, real distance, and slope, or the absolute coordinates, vertical distance, horizontal distance, and vertical angle).
Solves Linear Programming exercises with the simplex method (variants of Constraints ≤, Gran M, Two Phases, Dual Simplex) and the Graphic method.
A comprehensive touch-controlled periodic table of the elements with details about each element and plotting of details. PDF documentation.
Tower of Hanoi game that allows you to enter a challenge time, and calculates the average time per move or enter an average move time and calculate how long a practical activity with real objects will need. It implements the minimum 3-towers solution to the problem. It lists the required moves in lists L1 (from) and L2 (to). There is no animation of the contents of each tower.
Simple implementation of the Towers of Hanoi game.
Make the ball jump down the track without falling off the edge. Fun! An early work in progress. Calculator must be in degrees mode or it will not run properly.
Given Muzzle Velocity, and Muzzle Angle, the Horizontal Distance, Max Altitude, and Flight Duration are calculated. As with all of the author's spreadsheets, the blue text cells are the input data and the red text cells are the calculated output data. Note: The calculator must be in Degree mode.
Calculates the midsegment, height, and area of a trapezoid.
A simple trapezoidal channel calculator. Uses fsolve to solve Mannings and critical depth equations. For rectangular channels, use a side slope z=0. For triangular channels, use a bottom width b=0. Also calculates average shear stress.
Using the Trapezoidal Rule, approximates the integral of f(X): ∫f(X)dX=h/2*(f(a)+2*Σf(x_I)+f(b)), where a is the lower limit, b is the upper limit, n is the number of intervals, h is (b–a)/n, and x_I is a+h*I where I is from 1 to n-1.
Modeled after the game board in the 1950s-1980s television show Treasure Hunt. Presents you with 12 boxes, one has $50,000. Select a box by just tapping the screen. You will then be presented with a sure thing. A choose box will be presented where you make your choice to take the sure thing or take a risk and open the box. Good luck!
A simple spreadsheet to solve for three unknowns given three known. (3 Sides and 3 Angles) As with all of the author's spreadsheets, the blue text cells are the data input cells and the red text cells are the calculated output cells.
Triangle solver that allows you to set the accuracy of the result, solve right triangles, solve any other triangles, calculate the length of a line using two coordinate points, and calculate the centroid of a triangle plus the three line lengths. Includes PDF documentation.
A two-layer game where you must avoid hitting the opponent's trail.
Finds the longitudinal forces in a 2-dimensional- or 3-dimensional truss by means of solving the matrix of equations of equilibrium at the nodes for the entire system.
This is the official release of the Prime port of the 39gII Tunnel clone written in BASIC, now adapted for the larger screen and color display. This new version adds speed throttling to ensure that the game runs as close as possible to the same speed as the original Prime on both the emulator and G2 hardware revision of the calculator. It is probably the first ever game ever made available for download for this calculator model. It isn't meant to show coding skills, especially considering the game was made before the author's knowledge of the DIMGROB_P and BLIT_P commands (although an intro transition using them was added afterward), but as you'll see on-calc, even if the entire screen content must be refreshed every frame, it still gets a high frame rate, because of how incredibly fast the calculator is, even with redrawing the entire screen rectangles and score text every frame. As for the multicolor and 3D-ish text effects, they are possible because the HP Prime lets you use text with no background, so all you have to do is superpose multiple copies of that text, gradually changing its color and position through a FOR loop. This also lets you use bold text. To play, just use the UP and DOWN keys and quit with ON.
Several programs to graph different Ulam spirals.
Diagram of the unit circle for trigonometric math.
Unit converter that is faster and more flexible that the one by default in the calculator. It doesn't have all the units, but it have some new units that are commonly used in engineering.
Converts units between SI and the US systems.
Allows you to do unit conversions in a manner similar to the 48.
Simple program that calculates VAN and TIR for engineering economics.
Calculates the net present value NPV and the internal rate of return IRR knowing the cash flow and the investor interest, to quickly evaluate investment projects.
Calculates the liquid-vapor phase equilibrium of a real binary mixture, using the NRTL method.
Steam tables with thermodynamic properties of water and steam calculated from the industrial standard IAPWS-IF97.
Choose two parameters among pressure, temperature, specific volume, enthalphy, entropy, and steam fraction, and get the others as a result.
A collection of some of the most common Vector Calculus functions for rectangular, cylindrical, and spherical coordinates. Includes curl, div, Jacobian, Laplacian, unit normal, and more.
Creates a list with station and elevation information in L0. If a value between the VPC and VPT is entered in "Special Station", it returns data for that station only, if left at 0 the entire curve will be returned at the interval specified.
An application for the calculation of continuous beams, it is possible to enter different configurations of loads and supports, as a result it presents the reactions, equations in each of the ranges, the shear diagram, the moment diagram, the angle diagram, the deflection diagram and the maximum and minimum points of each diagram.
Calculates geometric properties of beams, including static moment and moment of inertia. Calculates the results of the supports, shear force, and bending moment. Fits linear, trapezoidal, and straight loads. It can also graph and display calculations, both by integration and section cuts.
An on-screen virtual keyboard, including QWERTY and Greek layouts. Also includes a version patched to work with ROM version 13333 and a version patched to be aware of theme changes (dark vs light).
On-screen virtual keyboard, which can be called from anywhere via the user keyboard.
An on-screen touch keyboard with QWERTY option.
An on-screen virtual keyboard with a dark theme, including QWERTY and Greek layouts.
An implementation of a software virus for the Prime. Includes an antivirus program, too. Do not run this unless you want to risk losing data on your calculator.
Generates Von Koch snowflake fractals.
Program to get a unit vector from a vector with N elements.
Uses the Wallis-Wasicki formula to calculate pi.
A wave, sky, and flying walrus animation that could be used in a future game and runs at about 40 frames per second.
Background boxes with falling water. There is random mist coming from the water.
Calculates wattage given voltage for an AD8318 logarithmic detector.
Converts the differents units of length used in CSS3. Converts between px, em, % and pt.
Two-player implementation of Weiqi.
Not really a program, but a way of using the TICKS function in a funny and simple way to plot a clock.
Does calculations for a Wheatstone bridge circuit. Given the four resistances and the input voltage, calculates the voltages in the middle and each side of the bridge.
Command that basically does an if-true, then do X, else do Y.
Calculates the Wilson Score interval, a good way for ranking things like popularity and skill of video game players, given the total number of trials and the number of "likes".
A replica of the default Windows 7 screensaver, displaying the Windows 7 logo at random locations on the screen.
Guess the word in 6 tries or less.
Given latitude and longitudes, calculates the distance between any two points on the Earth, approximating the planet as a sphere. Includes data for 40 major world cities.
Displays a simple periodic table of elements.
Thermodynamics Program. Given temperature, pressure and critical properties for a pure substance (gas or saturated condition); this calculates: compressibility factor “z”, volume, transience, and residual properties. PR and RK EOS are used.
Game created for participation in a contest by