"They needed memory fast enough to keep up w/ the optical CPU. Their solution was to bounce a laser beam off the moon." en.wikipedia.org/wiki/Delay_lin…
Some of my recent work with Alan Kay was shown at the ACM Turing Centenary: turing100.acm.org/index.cfm?p=we… (click "playlist -> alan kay", ~20 min in)
(2/2) but rather because its opponents eventually die, and a new generation grows up that is familiar with it." web.missouri.edu/~hanuscind/871… HT Kuhn