Videotex

Videotex (or interactive videotex) was one of the earliest implementations of an "end-user information system." From the late 1970s to mid-1980s, it was used to deliver information (usually pages of text) to a user in computer-like format, typically to be displayed on a television.

In a strict definition, videotex refers to systems that provide interactive content and display it on a television, typically using modems to send data in both directions. Unlike the Internet, all traditional videotex services were highly centralized.