Reply to post: More mainframe OS code

Multics resurrected: Proto-Unix now runs on Raspberry Pi or x86


More mainframe OS code

IN 1974-75 IBM provided the source code for their mainframe OS to some customers. A university I worked at then had it on microfiche. Somewhat later, a large insurance company in Vancouver had it, too.

And Burroughs provided source code for the MCP in that era, as well.

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