SubOS

In computing, a SubOS may mean several related concepts:

* A process-specific protection mechanism allowing potentially dangerous applications to run in a restricted environment.[1] It worked by setting a sub-user id which was user id of the owner of the file rather than the person running the file.[2]
* A substitute-operating system, which simulated a full operating system. These were mainly developed by the GameMaker community.
* An interface (graphical or terminal based) that provides additional functions or command for a specific audience target.

It can also make processes easier and add details to the main operating system.

## See also

* Virtual machine
* Sandbox (computer security)

## References

1. ↑ Ioannidis, Sotiris; Bellovin, Steven M.; Smith, Jonathan M. (May 27, 2024). "Sub-Operating Systems: A New Approach to Application Security". https://www.cs.columbia.edu/~smb/papers/subos.pdf.
2. ↑ Ioannidis, Sotiris (April 28, 2001). "SubOS-enabled Operating Systems". https://www.usenix.org/legacy/event/usenix01/freenix01/full_papers/ioannidis/ioannidis_html/node3.html.

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