Even right out of the box, the Samsung Galaxy Tab is an eminently useful device. Turn it on for the first time, click on Applications , and almost everything you need is already there, ready to use. A built-in alarm clock, web browser, calendar, music player, calculator, camera, contacts, newsreader, eBook reader, email, memo pad, file manager, navigation, instant messaging, social networking, office suite, you name it, it's probably already there. You could probably get by using just the preinstalled applications and wouldn't miss a thing. But the Galaxy Tab is more than just the features it already has. It's a full-fledged tablet computer using the very flexible and open Android operating system . As such, it has the potential to be much more than what it was brand new. This is where the Android Market comes in. The Android Market features hundreds, if not thousands of applications for the Android operating system, and many of them are absolutely free . So other than th...