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Additional comments by Tom Knight

This diagram is largely correct, but was not a snapshot in time. 1401 was gone before Multics 635 installation. 936/936A had not lisp machines until much later. 7090 was replaced by the 645 Multics machine. 908 had the Kludge PDP-7, and the AI PDP-1 was traded in for the PDP-6. The DM PDP-10 and the IMP were located near the DM PDP-6, toward what is labeled 1401. For those of you following along, synthetic biology was started in my lab in rooms 922/923. Source: https://twitter.com/TomKnightSynBio/status/1480629226990567428