Subversion is a tool used to store copies of a set of directories and files in a remote repository. Such repository is used mainly for two tasks: share these files with other users, and keep all different versions of these files during time. This type of tools are known generically as version control tools and are used quite frequently in industrial environments because they usually require sharing files among team members and keep all the changes perfectly stored. In order to use such tool two programs need to be installed, although for a regular user, only one of them is required. Obtain the files for the first time from the remote repository. This is usually the first operation to perform with the client program. Somebody else has created this remote repository with a first version of the files with which you must work and they are contained in a directory. After downloading the first version of the files with the checkout command, two identical copies of the files exist.