柏拉图系统（英语：PLATO），名称来自于自动教学用程序控制逻辑（英语：Programmed Logic for Automated Teaching Operations）的缩写，在1960年代，由伊利诺伊大学厄巴纳-香槟分校创建，于ILLIAC I上开发的电子教学系统。它是世界上第一个电脑辅助教学系统。柏拉图计划由控制数据公司提出与建造。这个系统以网络链接了十数台大型计算机，可支持上千台的图形终端机。

PLATO (Programmed Logic for Automatic Teaching Operations) was the first generalized computer assisted instruction system. Starting in 1960, it ran on the University of Illinois' ILLIAC I computer. By the late 1970s, it supported several thousand graphics terminals distributed worldwide, running on nearly a dozen different networked mainframe computers. Many modern concepts in multi-user computing were developed on PLATO, including forums, message boards, online testing, e-mail, chat rooms, picture languages, instant messaging, remote screen sharing, and multiplayer games.