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Re:Hotwire: HTML over the Wire by greenyoda on Tuesday December 22, 2020 @03:47PM (#25511044)
Virtual machines are not a recent invention. They were already being used on IBM mainframes starting in the early 1970s:

https://en.wikipedia.org/wiki/VM_(operating_system)

Notably, the VM operating system could run an instance of itself in one of its own virtual machines.

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