Story of Gary Kildall and Bill Gates involving IBM and Tim Paterson’s QDOS (which was based on Gary Kildall’s CP/M) was bought for just $50,000 by Microsoft, made it MS-DOS and made billion$
This clip is from the PBS series “Triumph of the Nerds”
Gary Kildall – The Man Who Could Have Been Bill Gates
The Computer Chronicles – Gary Kildall’s death
IEEE SPECTRUM Did Bill Gates Steal the Heart of DOS?