
Tech Brew Ride Home (IHP) The Gary Kildall Legend Part 2
Nov 25, 2023
Discover the fascinating story of Gary Kildall, the genius behind the modern operating system. Explore his crucial negotiations with IBM and how miscommunications altered tech history. The rivalry with Bill Gates unfolds as Kildall's innovative spirit meets the rise of Microsoft. Dive into the tension between Kildall's CPM software and PC-DOS, and reflect on the legacy of a man who shaped computing yet remained overshadowed. Unravel pivotal moments that forever changed the tech landscape.
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Microsoft's Solution
- Microsoft acquired Tim Patterson's QDOS, a 16-bit CPM-like OS, for $75,000.
- Renamed PC-DOS, it became the IBM PC's operating system, fulfilling IBM's immediate needs.
Microsoft's Strategic Advantage
- The IBM PC's open architecture allowed for clones, commoditizing hardware.
- Microsoft, controlling DOS, benefited from licensing fees, becoming increasingly valuable.
Kildall's Suspicions
- Gary Kildall, upon seeing PC-DOS, suspected it was a CPM clone due to structural similarities.
- He considered legal action, alleging infringement, particularly noting the dollar sign termination in MS-DOS Function 9.






