iTunes is a free software application for a Mac or PC that organizes and plays digital music and video on your computer. It syncs all of your media with your iPod, iPhone, and Apple TV, and it contains a store on your computer where you can purchase or get free apps, video and music.
Created by Apple, it's another revolutionary proprietary product that provides a convenient interface for you to enjoy your media collection. The idea is that you no longer have to look through CDs or flip through TV channels, you can just go to your computer and open iTunes. Plus most netizens enjoy the fact that you can browse everything faster, organize it all easier, and play anything you want whenever you want.
iTunes was introduced by Apple Inc. on January 9, 2001, at the Macworld Expo in San Francisco. Thank you Apple!