Extended play

An EP (short for extended play) is a musical recording that contains more music than a single, but is usually too short to qualify as a full studio album or LP. The term EP originally referred to specific types of vinyl records other than 78 rpm standard play (SP) records and LP records, but it is now applied to mid-length compact discs and music downloads as well. Ricardo Baca of The Denver Post said, "EPs—originally extended-play 'single' releases that are shorter than traditional albums—have long been popular with punk and indie bands." In the United Kingdom, the Official Chart Company defines a boundary between EP and album classification at 25 minutes of length or four tracks (not counting alternative versions of featured songs, if present).

History

EPs were released in various sizes in different eras. The earliest multi-track records, issued around 1919 by Grey Gull Records, were vertically cut 78 rpm discs known as "2-in-1" records. These had finer than usual grooves, like Edison Disc Records. By 1949, when the 45 rpm single and 33¹⁄₃ rpm LP were competing formats, seven-inch 45 rpm singles had a maximum playing time of only about four minutes per side.

Caroline Wozniacki

Caroline Wozniacki (Danish pronunciation: [kʰɑːoliːnə ʋʌsniˈɑɡ̊i], Polish: [vɔʑˈɲat͡ski]; born 11 July 1990) is a Danish professional tennis player. She is a former World No. 1 on the WTA Tour, having held this position for 67 weeks. She was the first woman from a Scandinavian country to hold the top ranking position and 20th overall.

From her WTA debut in 2005, she improved her year-end ranking each year until finishing on top in both 2010 and 2011. Wozniacki has won 23 WTA singles titles as of March 2015, three in 2008, three in 2009, six in 2010 (the most in a year by a WTA player from 2008–2011), six in 2011, two in 2012, one in 2013, one in 2014 and one in 2015. She was runner-up at the 2009 and 2014 US Opens and the 2010 WTA Tour Championships in Doha to Kim Clijsters. She won the 2006 Wimbledon Girls' Singles title but has yet to win a women's Grand Slam title. She also holds two WTA titles in doubles. In 2008, Wozniacki won the title of WTA Newcomer of the Year.