A collection of 20 programs that showcase the elegance of RPN programming on the legendary HP-15C. From Euclid's algorithm to chaos theory, three millennia of mathematics implemented in 448 bytes of program memory.
Category: Retro-Computing
A fully functional web-based emulator of the legendary HP-15C scientific calculator. Experience authentic RPN operation, programmability with 448 steps, matrix operations, and complex number arithmetic. Discover why this 1982 calculator remains beloved by engineers and mathematicians four decades later.
Category: Retro-Computing
Explore the elegant mathematics behind measuring curved areas. Watch rectangles multiply and errors shrink as Riemann sums converge to exact integrals. An interactive journey from Archimedes to modern calculus.
Category: Mathematics
Transform abstract quadratic equations into interactive projectile motion. Switch between standard, vertex, and polar forms while aiming a cannon at targets. Watch your mathematical reasoning play out in real-time trajectories.
Category: Mathematics
From idea to interactive city in minutes. Watch tiny cars navigate a Manhattan-style grid, stopping at intersections, following traffic laws, and flowing through a procedurally generated cityscape. Click anywhere to add cars and observe emergent traffic patterns.
Category: Notes & Inquiries
An interactive tour through eight fundamental statistical distributions. Watch randomness organize itself into predictable patterns, from the ubiquitous bell curve to the rare-event Poisson distribution.
Category: Mathematics
Experience the dawn of personal computing with a browser-based TRS-80 emulator. Features authentic green phosphor display, working BASIC interpreter, and classic programs on virtual floppy diskettes.
Category: Retro-Computing
A faithful recreation of Atari's 1979 vector graphics classic. Physics simulation with authentic gravity mechanics, thrust control, and precision landing challenges.
Category: Games
Scientifically accurate solar system simulator. Models celestial mechanics using Kepler's equations. Set it to any date and see the exact positions of all eight planets.
Category: Mathematics
Artificial Intelligence often feels like magic—a "black box" where data goes in and answers come out, with little visibility into the machinery in between. This Neural Network Visualizer is designed to strip away that mystery.
Category: Mathematics