Version control systems are most commonly run as stand-alone applications, but revision control is also embedded in various types of software, such as word processors and spreadsheets, collaborative web docs, and content management systems, e.g., Wikipedia's page history. Today, the most capable (as well as complex) revision control systems are those used in software development, where a team of people may concurrently make changes to the same files. The numbering of book editions and of specification revisions are examples that date back to the print-only era. The need for a logical way to organize and control revisions has existed for almost as long as writing has existed, but revision control became much more important, and complicated, when the era of computing began. Revisions can be compared, restored, and, with some types of files, merged. Each revision is associated with a timestamp and the person making the change. When the first change is made, the resulting set is "revision 2", and so on. For example, an initial set of files is "revision 1". Ĭhanges are usually identified by a number or letter code, termed the "revision number", "revision level", or simply "revision". Version control is a component of software configuration management. In software engineering, version control (also known as revision control, source control, or source code management) is a class of systems responsible for managing changes to computer programs, documents, large web sites, or other collections of information. JSTOR ( April 2011) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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