The document discusses how to become an Android application developer. It explains that Android is an open source and growing mobile operating system that allows users to create their own apps. Some key requirements to becoming an Android developer include understanding the Android platform, following Google's design guidelines, and having the necessary machine, software and programming skills. Specifically, developers need a computer running Linux, Windows or Mac OS, knowledge of Java, XML and the Android software development kit, and an understanding of the Android ecosystem.