System 8

System 8 may refer to:

Computing

 * Copland, an unreleased operating system
 * Mac OS 8, a late 1990s version of the Macintosh operating system
 * Digital Equipment Corporation PDP-8 operating systems:
 * OS/8, released in 1971
 * TSS/8, released in 1968
 * MS/8, released in 1966
 * PDP-8 4K Disk Monitor System, released in 1965
 * Exec 8, the Unisys operating system
 * WPS-8 (Word Processing System-8) - Digital Equipment Corporation word processor

Other uses

 * STS-8 (Space Transportation System-8), the Space Shuttle mission
 * Base-8 number system
 * Roland System-8, the Roland Corporation synthesizer