PLATO - Programmed Logic for Automated Teaching Operations - originated in the early 1960s at the University of Illinois at Urbana-Champaign, where a team led by Donald Bitzer built what the university’s Distributed Museum describes as the first generalized computer-assisted instruction system. It ran out of the Computer-based Education Research Laboratory (CERL) and connected terminals to a central mainframe over leased telephone lines, decades before the personal computer.
The landmark version, PLATO IV, launched in January 1972. Its terminals used an orange plasma flat-panel display - a technology PLATO’s engineers helped invent - that could draw bitmapped graphics, paired with an infrared touch panel so students could answer by touching the screen. Lessons were authored in a purpose-built language called TUTOR. By early 1976 the system ran roughly 950 terminals offering more than 3,500 contact hours of courseware, according to a CERL final report to the National Science Foundation.
PLATO is best remembered not just as a teaching machine but as an early online community. It hosted message boards, email, instant messaging, and multiplayer games years before those ideas reached the wider public, making it a direct ancestor of modern networked learning and social software.
Why business readers should care: the promises made for AI tutoring today - individualized pacing, instant feedback, learning at scale - were first made for PLATO more than sixty years ago. The gap between that vision and routine classroom reality is the oldest recurring story in education technology.