Downloads
Mini Calculator for your desktop.
No-nonsense always-on-top calculator for everyday use. Never go without it.
Hewlett-Packard Comp. donated the emulation of its famous programmable HP-41CX scientific calculator to the public domain. The 41CX lets you choose from three sizes on your display: small, medium and large.
Instruction manual under Help.
User code can be saved.
Number Cruncher
This tiny calculator hides huge calculating power. It performs super calculations like raising high powers. In this example 10 to the power 125: the estimated total of moves in the game of chess.
Pinwheel simulator
This educational program teaches you how to add, multiply, subtract, divide, etc. on a real working pinwheel calculator (Ohdner-like machine). The fully operational simulator was programmed by David Dirkse a Dutch math teacher.
Consul simulator
Educational toy (1916) originally made by Manufacturing Company of Springfield, Massachusetts. The toy can multiply and divide in the range: 1x1 to 12x12. Multiply: move the feet onto the numbers and read the product between the two fingers. Divide in reverse order. Put the fingers on a number and the right foot on an other and read the result at the left foot. The simulation for Windows is pure fun!
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