The rise and fall of IBM's 4 Pi aerospace computers: an illustrated history

· Ken Shirriff · March 29, 2026, 4:38 p.m.
Aerospace IBM space IBM military technology Space Shuttle History of Technology
Summary
This blog post provides a detailed history of IBM's System/4 Pi aerospace computers, which played crucial roles in various military and space applications, including the Space Shuttle. It covers their development, specifications, and contributions in depth, reflecting on technological advances over decades in aviation and space technology.
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