2003+Event+4

=iTunes 4.0 : Music Store= On April 28, 2003, iTunes 4.0 was released which was the first version to feature an online Music Store. As of July 2007, the store has sold 3 billion songs, accounting for more than 80% of worldwide online digital music sales. The current version of iTunes sells Music, Audio Books, Video Content, and iPod games.

//- Josh Truelson//