Up to that point, all commercial video game products had been based on discrete, dedicated logic circuitry to generate on-screen gameplay. None in commercial production used a computer as the heart of its architecture. The Odyssey, developed by a team of engineers at defense contractor Sanders Associates, utilized mid-1960s technology that precluded the used of a computer. Likewise, the founders of Atari had originally sought to run games as computer software on minicomputers around 1969, but the high cost of the systems involved made that dream impractical.