The document summarizes different types of Apple iPods including the Shuffle, Classic, Touch, Nano, and Mini. It provides details on their price ranges, number of models released, maximum memory capacities, key facts, and bibliography. The iPod Touch has had 3 models costing $199-399 while the Shuffle has had 3 models from $59-79. The Classic has the most memory at 160GB and was the first iPod released in 2001.