iPod Nano

Apple Computer's lineup of iPods has long been king of the hill among digital music players, but a new generation of rivals aims to claim a bigger piece of the glory. Shown here is the iPod Nano, released in September 2005, which comes in 2GB and 4GB models, with prices starting at $199. It's also notable for its physical proportions: just a quarter-inch thick and 3.5 inches tall.