Comment Re:Um... (Score 3, Informative) 162
PLATO was born in 1960. By 1973 it had grown to the point that it enabled social networking of sorts - online games as well as its ostensible purpose for computer aided instruction.
I remember PLATO terminals in the university library when I was first using computers - they were big amber plasma screens that did pretty good graphics for the time. Beat punched cards and green bar paper as far as user interface hands down. It was a lot nicer than the dumb terminals that were starting to be available for coding.