This is a take-it-easy Lua project of pucelano's that should find some use in a classroom setting (though bringing a PSP to a SAT exam might actually get you in trouble...). We have seen a lot of PSP calculators pass through our hands, from the bare-bones basic to the pimped-up full emulations like Zx-81's HP48 emulator (certified for classroom use, but your teacher may disagree).

Easy PSP Calculator, despite its name, is not a bare-bones Lua release. While it doesn't have the full utility of a scientific calculator, it nevertheless incorporates basic trigonometric functions, useful for algebra, basic calculus, and geometry. You know, basic high school stuff. Despite being encoded in Lua, it's been worked so that it can be opened off the MemStick, so you're not gonna need a copy of Lua Player for this homebrew calc.

So if you're stumped trying to long hand calculations for sine waves, you could try reaching for some help...

Download: Easy PSP Calculator v1.0