Caveman’s Calc is a digital slide rule.

The Poor-Man’s Calculator
So you can’t afford a fancy graphing calculator. Or even a simple addition/subtraction/multiplication/division calculator. But you do have a Mac running Tiger. How fortunate.

Caveman’s Calc is a digital slide rule - a digital analog calculator if you will. Like the real thing, the interface couldn’t be simpler: just slide the middle portion left or right, allowing you to multiply, divide, take square roots, logarithms, inverses, and a couple of other surprises. A short introduction to using slide rules is included in the help file.