Git, THE content versioning system. Now it is a standard tool in the swiss army knife of every programmer in the world, worthy of this name. To the few, who are relatively new to programming and use other inefficient systems to share and catalogue their code, it is essential to fill the gap in their toolset.
Here I provided a (very) basic introduction to start using this wonderful, essential tool.
For the sake of opennes both a ODP file and PDF file is available.