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
Atari, Inc. the game "Go", Bushnell shared with Dabney his gaming-pizza parlor idea, and had taken him to the computer lab at Stanford Artificial Intelligence Laboratory to see the games on those systems. They jointly developed the concept of using a standalone computer system with a monitor and attaching a coin slot to it to play games on. Bushnell and Dabney worked with Nutting Associates to manufacture their product. Dabney developed a method of using video circuitry components to mimic functions of a computer for a much cheaper cost and a smaller space. Bushnell and Dabney used this to develop a variation