Numerous albums from legendary rock band Pink Floyd have disappeared from Apple's iTunes store, along with other digital storefronts, following the expiration of a contract between the band and its record label.

Pink Floyd's contract with EMI covering albums post "Dark Side of the Moon" expired on June 30. Since then, some of the band's most popular albums, including "Wish You Were Here," "The Wall," and "Animals," were removed from the iTunes Music Store, as well as Amazon.com and other digital music sellers.

However, the albums — and some individual tracks — can still be purchased through the "Oh By the Way" studio album boxset available on iTunes, and released in 2008 by EMI. The set includes both discs of "The Wall," which can be purchased separately from the box set, but "Wish You Were Here" can only be bought as part of the $139.99 total collection.

Pink Floyd and EMI are no longer under contract for later albums, but earlier titles like "Dark Side of the Moon" remain under the label's control. In addition, while EMI can no longer press CDs for titles like "Wish You Were Here," the company can sell its remaining stock of physical albums.