Single

In music, a single is a song considered strong enough by the artist and record company to be released separately from an album as well as featuring on the album. It is often accompanied by several "B-sides" - usually songs which did not make it onto the album or remixes.

In the UK, a single must meet certain criteria:

• A maximum of twenty minutes for each single format, including multimedia content
• A maximum three different tracks for each format
• Each format must contain the featured song
• A maximum of 3 different formats (CD, DVD, 7" vinyl, 12" vinyl, cassette)

Anything which exceeds these requirements is categorised as an EP or an album.