Release Notes: Tracks that have been purchased can be authorized to play on up to five computers, a number that has increased from three in previous versions. The number of times you can burn a playlist to an audio CD has been reduced from ten to seven. Also new is iMix, a feature which allows you to publish your playlists on the iTunes Music Store and include comments on each track.
Release Notes: This version features the iTunes Music Store, which allows users to browse and purchase music online. It supports playing and encoding of the AAC format, and introduces a music sharing facility through Rendezvous.