Tim Paterson Alive
Wrote QDOS — Quick and Dirty Operating System — in six weeks; Microsoft bought it and it became MS-DOS.
1960198020002020
Created MS-DOS
Wrote QDOS/86-DOS (1980) at Seattle Computer Products — the 'quick and dirty OS' Microsoft bought for $75,000 and licensed to IBM.\n\nThe cheapest purchase in tech history; he later worked at Microsoft on MSX-DOS.