When the Intellivision first came out in 1978, its games were made by APh Technological Consulting. When they knew they could get much more profit making them themselves, Mattel created their own software development group. The original five members of that Intellivision team were manager Gabriel Baum, and Don Daglow, Rick Levine, Mike Minkoff and John Sohl. Levine and Minkoff (Minkoff is a long-time Mattel Toys veteran) both came over from the hand-held Mattel games engineering team. To stop them and later programmers (the Mattel team peaked at 110 people in 1983) from being hired away by their rival Atari, their identity and work location was secret.