System 4 or System IV may refer to:
- Acorn System 4, the early minicomputer
- The fourth release of Classic Mac OS
- International Computers Limited#English Electric LEO Marconi (EELM), also known as ICL System 4
- Not-released Unix system between UNIX System III and UNIX System V
- STS-4 (Space Transportation System-4), the Space Shuttle mission
See also edit
This disambiguation page lists articles associated with the title System 4.
If an internal link led you here, you may wish to change the link to point directly to the intended article.
If an internal link led you here, you may wish to change the link to point directly to the intended article.