The document discusses the history of education technology from the late 1950s to the mid-1990s. It notes that the National Defense Education Act brought new technologies like computers into schools in the late 1950s, mainly for vocational programs. By the late 1960s, schools began incorporating computers into vocational training programs. Then in the 1980s, computers proliferated in schools as the Apple II, IBM PC, and clones became available and commercial educational software was developed.