The Atari 2600 (or Atari Video Computer System before November 1982) is a home video game console from Atari, Inc. Released on September 11, 1977, it is credited with popularizing the use of microprocessor-based hardware and games contained on ROM cartridges, a format first used with the Fairchild Channel F in 1976. This contrasts with the older model of having dedicated hardware which could only play the games physically built into the unit. The 2600 was bundled with two joystick controllers, a conjoined pair of paddle controllers, and a game cartridge: initially Combat, and later Pac-Man. For five years, 1977 until November 1982, the system was officially sold as the Atari Video Computer System, abbreviated as Atari VCS or simply VCS. Following the release of the Atari 5200 in November 1982, the VCS was renamed to the “Atari 2600”, after the unit’s Atari part number, CX2600.