A colleague made a pretty cool blog post about svn basic on his blog. Subverion is a software versioning and a revision control system. At work all our program code and scripts, every little piece of code is going in your Subversion repository. This allows you to get back to earlier revisions of the code or simply share and work on code with other employees. Even your documentation is going into the Subversion repository.
On his blog post (German) he shows the basics of subversion, doing a checkout of e repository, adding files, changing files, removing files and more.
svn checkout http://svn.colab.company.com # SVN checkout
svn commit -m "My Message and Changes" # SVN committing changes and new files
svn add /files/*.* # Adding Files to the SVN Repository after this you have to commit that
svn update # Update your local copy
A lot of IDE’s (Integrated Development Environment) like Visual Studio or Xcode have SVN integrated.