APh Technological Consulting was an engineering firm based in Pasadena, California. It was formed in 1974 as a limited partnership by two California Institute of Technology (Caltech) students, Glenn Hightower and John Denker. APh is an abbreviation for "applied physics". In 1976, APh was hired by Mattel to help design the Intellivision system. They also developed the operating system and the first games. College students wrote the code for the early games, and received very low pay, not equivalent to the hundreds of thousands of games that were sold.
Several members of APh left in 1982 and started Cheshire Engineering after a dispute over profits from developing Mattel’s "M Network" line of Atari 2600 games.
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