The Power CD, a 1993 Apple digital-music flop, may not make this list, but the iPod certainly earned its place. Released in the relative dark age of 2001, the first iPod offered "1,000 songs in your pocket" and a nascent iTunes, then just a "digital jukebox."
The iPod embodied the kind of gestalt we've come to expect from Apple: an exciting, refined device that consumers didn’t even know they needed yet.
As it began to capture the market's attention in 2005, the iPod snowballed into the world's premier digital-music gadget, cementing Apple’s image as the flagbearer of the digital music revolution. With the later introduction of the entry-priced iPod Shuffle, Apple effectively made personal digital-music players available to everyone and anyone.
Source: Wikimedia Commons