Dawn of a revolution
news.harvard.edu
news.harvard.edu
(I used to tease Gates late at night in the computer room about playing with hobbyist computers, when there were so many powerful mainframes on the early ARPAnet (about 20 machines total) available to anyone who could telnet in, and so many interesting research projects going on around the net. My favorite was Englebart's NLS system, which was sorta barely useable on a remote terminal but still fascinating.)
Also, there weren't several PDP-1's, there was only one, which was used routinely as a display terminal for the PDP-10 (HARV-1 and HARV-10 by name in NCP (pre-TCP) days).
As they say, success is where luck meets preparedness...