This document provides an introduction and history of computer games and gaming platforms. It discusses the origins of video games in the 1940s-1960s on mainframe computers. Video games then diverged into arcade, mainframe, console, PC and handheld games. The document outlines the 7 generations of gaming consoles from the 1970s to present, including key consoles like the Magnavox Odyssey, Atari 2600, NES, SNES, PlayStation and discusses some important early games. It aims to provide background on the games industry.