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.

• Virtual machine
• Sandbox (computer security)

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