< Rewind to 1973. The operating system common on microcomputers was CP/M

OK. I love Raymond’s blog but this is crazy. Microcomputers existed only as a prototype in 1973 (things like Intel’s Intellec dev systems) and there were no operating systems for them. Strictly speaking, Kildall did start developing CP/M in 1973, but at that point it ran only on a simulator on a PDP-10 mainframe.

1979, sure. 1973? Way too early…