3 ms·
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_(oper
by greenyoda 6y ago
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) 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.