The Internet Archive - VisiCalc - my first massive programming effort was a complete bookkeeping system based on VC macros for the Shack Model I. Lasted me until we could move up to PC and Managing Your Money (in DOS, pre-mouse).

Still have a functioning original PC. Used it exclusively for playing DigDug until the CRT died.

Can Internet Archive read my Shack Double-DOS two-sided 5" floppies? There's some old WordStar texts I'd like to recover.