The Intellivision is a home video game console released by Mattel Electronics in 1979. The name is a portmanteau of "intelligent television". Development began in 1977, the same year as the launch of its main competitor, the Atari 2600. Game development ran from 1978 to 1990 when the Intellivision was discontinued. From 1980 to 1983, more than 3 million consoles were sold. Between 1979 and 1989, a total of 133 titles were released.