Gary Kildall - Wikipedia

Gary Kildall: Did Microsoft Steal DOS? - HubPages

The man who could have been Bill Gates

Part 2. IBM's mistake in 1980 to agree to allow Microsoft to maintain the right to sell MS-DOS to other computer manufacturers

Shared post - The Wiki Piggy Bank

Unsung Hero: Exploring Gary Kildall, the Man Who Almost Became Bill Gates

Shaking off the C shackle - Software - Retro Computing

Gary Kildall Develops the CP/M Operating System for Microcomputers : History of Information

Why it is said that Bill Gates stole MS-DOS from Gary Kildall and GUI from Xerox PARC? - Quora

This Week in History of Computing - TINUSAUR

Gary Kildall: The Near-Gates - digitec

The Death of Gary Kildall Remains a Mystery to This Date

ASCII - Wikipedia