The first iPod was sold five and a half years ago, in November 2001, and since then Apple has introduced more than 10 new iPod models, including five generations of iPod, two generations of iPod mini, two generations of iPod nano and two generations of iPod shuffle.

"At this historic milestone, we want to thank music lovers everywhere for making iPod such an incredible success," said Steve Jobs, Apple's CEO. "iPod has helped millions of people around the world rekindle their passion for music, and we're thrilled to be a part of that."

The iPod has also sparked an unprecedented ecosystem of over 4,000 accessories made specifically for the iPod that range from fashionable cases to speaker systems, and more than 70 percent of 2007-model US automobiles currently offer iPod connectivity.