Linked by Thom Holwerda on Sat 7th Apr 2012 23:37 UTC
"Punix is a Unix-like operating system for the Motorola M68000-based TI graphing calculators, starting with the TI-92+. It is currently under development and is not ready for widespread use yet. So far the kernel is being written, and user-space utilities and applications will follow." ...amazing.