It's likely that you will already have heard of Distributed Version Control Systems such as Git, but what are they and how do they work? This course sets out to answer the questions of what is going on under the hood, and to demonstrate the new workflow you would need to learn if you started using it. We look at DVCS from the perspective of three different development scenarios - single developer projects, open source projects, and commercial projects. This course includes lots of diagrams that will help you understand the DAG, which is the way DVCS store their history, and there are demos of using both Mercurial and Git. We also see how you can make use of repository hosting from sites such as BitBucket and GitHub.