Commit bit

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The Commit bit is permission to contribute to a shared source code for a software project.

To contribute source code on most large projects, one must make modifications and then "commit" those changes to a central repository such as CVS. To have "a commit bit" on one's user account means that one is permitted to commit those changes. This dates to the use of a literal binary digit to represent yes-or-no privileges in many software system. Contrast with "wheel bit."