Originally priced at $399, the iPod took a while to get going. But the 2003 introduction of iTunes, followed by 2004's Mini and 2005's Nano, made the iPod a cash cow for Apple -- especially during the holiday season. In every year since 2004, holiday quarter sales have more than doubled the average iPod sales in all other quarters.
Apple's iconic co-founder turned a company launched in a garage into Silicon Valley's greatest innovator.
