Like all [version check] software (https://it.wikipedia.org/wiki/Controllo_versione ‘Version check’), GitLab allows the creation of public or private repositories, where developers can upload their code and manage changes to the various versions at the same time as multiple people work. In GitLab, you can work in parallel with other people on the same project without generating conflict, uploading your work in the remote repository (operation of _push_) and being able to combine the changes of all in one project at the end (operation of _merge_). You can make _merge request_ for the repository owner, in addition to tracking the issues, the possibility to write comments and attach documents. (Wikipedia’s entry <a
href="https://it.wikipedia.org/wiki/GitLab"&gt;‘GitLab’</a>, licensed by <a
href="https://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-Share-Alike License 3.0</a>.)