2026-03-29 16:53 UTC
In 1967, IBM introduced the System/4 Pi line of aerospace computers, packing mainframe performance into a compact box. 4 Pi computers powered everything from military aircraft to the Space Shuttle to sonar systems on submarines. Thread...
Replies (3)
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@kenshirriff@oldbytes.space 2026-03-29 16:59
IBM's 4 Pi computers were built from simple TTL integrated circuits and used magnetic core memory for storage. "Flat-pack" integrated circuits on multi-layer circuit boards provided dense logic. The board below was round to fit inside a tactical missile, but most of the computers used standardized rectangular boards called "pages".
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@nicholas@aklp.club 2026-03-29 17:04
The image on the left looked like a folder-hanger for a second as I scrolled, and now I want all of my file cabinate drawers to look like that 🤩
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@RichieRich@hessen.social 2026-03-29 17:33
@kenshirriff The Raspberry Pi oft the Sixties! ☺️