Abstract :
Software evolves in small steps or versions. Often these versions are results of collaborations among different persons. At times we want to fall back to a previous version or compare different variants. Or, we need to trace changes to change requests. All these tasks relate to version control and show that tool support in this domain is indispensable, as it is with editors and compilers. The author describes available tools and shows why the CVS open source tool is so popular among practitioners
