IPod:

On April 9, 2007, it was announced that Apple had sold its one-hundred millionth iPod, making it the biggest selling digital music player of all time. In April 2007, Apple reported second quarter revenue of US$5.2 billion, of which 32% was made from iPod sales. Apple and several industry analysts suggest that iPod users are likely to purchase other Apple products such as Mac computers.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". What is an item that owners of iPods may also purchase?
Mac computers