Initial setup is completed. The first tutorial in my Android book is to write a program called "GeoQuiz". The idea behind this application is that the user is given a geography fact and has to select either true or false corresponding to whether or not they believe the fact is true. Android uses XML files to organize and display the user interface. I've used XML files before to automate testing; I've never used XML to create a user interface. XML stands for Extensible Markup Language, and is very similar to HTML in syntax.