The Magnavox Odyssey, marketed in 1972, was the first commercial home video game console. It originated from the “Brown Box” developed by Ralph Baer and his team at Sanders Associates, whose design was licensed to Magnavox. The Odyssey had no microprocessor and did not run software: it operated through electronic circuitry. Its interchangeable cards contained neither games nor programs; instead, they established different connections within the internal circuitry to configure each game mode. Because of its limited graphical capabilities, it used colored transparent overlays placed over the television screen to represent scenery, and some games were supplemented with physical components such as cards, tokens or dice. Its appearance in 1972 established the commercial concept of the home video game console.