1973 Invention Talkomatic is created by Dave Woolley and Douglas Brown at the University of Illinois, as a multi-user chat room application. It is an instant sensation among users in the PLATO System's online community (16 h 46 m, 1 ene 1975 año – 12 h 52 m, 28 mar 1975 año)
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16 h 46 m, 1 ene 1975 año
12 h 52 m, 28 mar 1975 año
~ 2 months and 26 days