CALL (Computer Assisted Language Learning) began in the 1950s using large mainframe computers for language learning, primarily teaching English and Russian. In the 1970s-1980s, computers classified as mainframes, mini-computers, and microcomputers started being used for language learning. Notable early projects included the PLATO system and the Athena Language Learning Project in the 1980s. Computers and CALL programs have continued advancing to improve language learning.