Cameron Kaiser / Ars Technica:
A look back at PLATO, an educational computer system released in 1960 that some consider a precursor to graphics, touchscreens, messaging apps, games, and more — Forums, instant messaging, and multiplayer video games all started here. — Bright graphics, a touchscreen, a speech synthesizer …
Source : http://www.techmeme.com/230318/p9#a230318p9