The Atari 2600, originally branded as the Atari Video Computer System (Atari VCS) until November 1982, is a home video game console developed and produced by Atari, Inc. Released on September 11, 1977, it popularized the use of microprocessor-based hardware and of games stored on swappable ROM cartridges, a format first used with the Fairchild Channel F in 1976. The VCS was bundled with two joystick controllers, a conjoined pair of paddle controllers, and a game cartridge—initially Combat and later Pac-Man.   Source: Wikipedia, Youtube