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Once up a time there was no Git ... and now there is. The world is a better place thanks to Linus Torvalds et al!
From https://en.wikipedia.org/wiki/Git:
Git (/ɡɪt/) is a distributed version-control system for tracking changes in source code during software development. It is designed for coordinating work among programmers, but it can be used to track changes in any set of files. Its goals include speed, data integrity, and support for distributed, non-linear workflows.
Webel IT Australia now uses Git in combination with nearly every project, and not just for software projects!