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To begin using GitHub, you will first need to sign up for an account.  For the code examples in this tutorial, you will need to replace \verb|username| with the username of your account.  Next choose the option to ``Create a new repository'' (Figure \ref{fig:Fig3}B). \ref{fig:Fig3}B, https://help.github.com/articles/create-a-repo/).  Call it ``thesis'' because that is the directory name containing the files on your computer, but note that you can give it a different name on GitHub if you wish.  Also, now that the code will be existing in multiple places, you need to learn some more terminology (Box 1).  A local repository refers to code that is stored on the machine you are using, e.g. your laptop; whereas, a remote repository refers to the code that is hosted online.