While Atari designed their console, they code-named it Stella. When released in 1977, they called it the Video Computer System (VCS for short). There was also a version that was sold at Sears called the Sears Video Arcade. It was not called the Atari 2600 until the Atari 5200 released in 1982. The 2600 is called this because that is the part number the company used to tell the difference in versions.