Gran Trak 10 for two games to be played for a quarter rather than one. A placard on the front of the game gives suggested ratings for the score in a given game, from "License Revoked" for 10 or fewer points to "Real Pro" for greater than 40; the operator's manual suggests changing or removing this card if the time per game is adjusted. In the fall of 1973, Atari began work on a driving game, an idea founder Nolan Bushnell had wanted to do since the company was initially founded in June 1972 before it was shelved in favor of "Pong". The
Nolan Bushnell restaurant executive and focused on Catalyst Technologies. Through 1981 and 1982, Bushnell concentrated on PTT subsidiaries Sente Technologies and Kadabrascope. Sente was a reentry into the coin-operated game business. Arcade cabinets would have a proprietary system and a cartridge slot developed by Data East Corporation, so operators could refresh their games without having to buy whole new cabinets. Kadabrascope was an early attempt at computer assisted animation. In 1983 as the restaurants started to lose money, Sente, though profitable, was sold to Bally for $3.9 million and Kadabrascope was sold to Lucas which became the beginnings of what became Pixar.