System 2

System Two, System II or System 2 may refer to:

Computing

 * Acorn System 2, the early microcomputer
 * Atari System 2, the arcade game platform by Atari
 * Apple System 2, the operating system version for the Apple Macintosh
 * Capcom System 2, an arcade system board in the 1990s
 * Cromemco System Two, a computer system by Cromemco from 1978
 * Channel F System II, game console by Fairchild
 * Digital Access Signalling System 2, the protocol by British Telecom
 * Global File System 2, the file system by Red Hat
 * Master System II, the 8-bit video game console by Sega
 * Namco System 2, the arcade system board by Namco
 * Sega System 2, an arcade system board in the 1990s
 * S2 (programming language), style system 2

Other

 * System 2 in Trilogy, an album from rock band Angeldust
 * Super System 2, the poker system
 * System Shock 2, the computer game