# 86-DOS **Entity class:** Software **Research spine:** [[research/Chronology of Signals, Silos, and Sovereign Software - Research|Chronology of Signals, Silos, and Sovereign Software]] ## Definition 86-DOS was the operating system acquired from Seattle Computer Products and adapted by Microsoft for IBM's personal computer. ## Chronological Proximity Its 1980–1981 acquisition occurred as IBM's Boca Raton team accelerated its personal-computer program. ## Relational Proximity Microsoft transformed 86-DOS into [[wiki/MS-DOS|MS-DOS]] and retained nonexclusive licensing rights, making the operating layer more strategically valuable than any single hardware platform. ## Collection Routes [[collections/The Civilian Intelligence Marketplace|The Civilian Intelligence Marketplace]] · [[collections/Terrorism, Counterterrorism, and the Intelligence Environment|Terrorism, Counterterrorism, and the Intelligence Environment]] · [[wiki/Signals, Silos, and Sovereign Software|Signals, Silos, and Sovereign Software]] ## Sources / Provenance - [[research/Chronology of Signals, Silos, and Sovereign Software - Research|Chronology of Signals, Silos, and Sovereign Software - Research]].