Use this tag for questions about SVN (Subversion), a centralized open-source revision control system distributed under the Apache License.
Apache Subversion
Apache Subversion (SVN) is a centralized version control system, available as free software under the apache-license.
When Subversion was first conceived in 2000, the design goal was to fix CVS. Since 2009, Subversion has been an Apache project.
See its own SVN repo in svn.apache.org
or its mirror on GitHub.
Subversion can be used from the command line, but also has gui clients for windows, linux and osx. A popular client, which integrates into Windows-Explorer, is TortoiseSVN. A list of SVN clients with comparison can be found here.
References
The Subversion book is an excellent reference source, cite it in your SVN answers! Please use links to the latest stable release of the book (not to the nightly builds to avoid broken links).
Frequently-asked questions
If you are new to Apache Subversion or version-control in general please take some time to read the SVNBook. The must-read articles are: