It was/is amazing, and was actually released 31 years ago! https://en.wikipedia.org/wiki/Derive_(computer_algebra_system) https://en.wikipedia.org/wiki/Derive_

It was/is amazing, and was actually released 31 years ago! https://en.wikipedia.org/wiki/Derive_(computer_algebra_system) https://en.wikipedia.org/wiki/Derive_(computer_algebra_syste... I used it as a DOS program well up into the late 90s on my HP200lx... One of the badass things about it, afaik, hasn't been reproduced in any CAS: the quasi-ncurses looking menu made it easy to use on limited hardware and you didn't have to waste time looking things up. I occasionally consider buying one of the TI calculators just to fool around with it again.