Android is an operating system specially designed to run on mobile devices. It’s derived from the Linux operating system -- the free, open-source operating system that runs a significant percentage of the servers that contain the World Wide Web. We’re not going to go into a history lesson here. We just want to point out that Android is a small, elegant interpretation of a powerful operating system, designed for a device with limited memory and battery power. Your Android device is a full-blown computer, capable of incredible things. But it also deals with limitations that computers don’t have to deal with -- what to do if the battery runs down, or how to stop your application if a phone call comes in. Android answers these questions with its powerful technology, but it also has an attractive interface, and it’s very stable (avoiding freeze-ups and crashes). Your Android phone is a tool that can make your professional life more efficient and smoother. But Android can be fun --...