A CD single is a music single in the form of a compact disc. The format was introduced in the mid-1980s, but did not gain its place in the market until the early 1990s. Dire Straits "Brothers in Arms" (1985) is reported to be the world's first CD single, issued in the UK in two separate singles as a promotional item, one distinguished with a logo for the tour, Live in '85, and a second to commemorate the Australian leg of the tour marked Live in '86. Containing just four tracks, it had a very limited print run. The 8cm (3") Mini CD format was originally created for use for singles in the late 1980s, but met with limited success, particularly in the U.S. The smaller CDs were more successful in Japan, and have recently become more common in Europe, marketed as "Pock it" CDs. It was common in the 1990s for U.S. record companies to release both a 2-track CD and a multi-track (usually "remix") maxi CD. In the UK, record companies would also release two CDs, but usually these consisted of three tracks or more each. As chart rules changed, this formatting was changed to the U.S. practice of releasing both a 2-track version and a maxi CD.
