EP
An extended play (EP) is a musical recording that contains more tracks than a single but fewer than an album. Contemporary EPs usually contain up to eight tracks and have a playing time of 15 to 30 minutes. An EP is usually less cohesive than an album and more "non-committal".
The term "extended play" originally referred to a specific type of 45-rpm phonograph record other than 78-rpm standard-play (SP) and 33+1⁄3-rpm long-play (LP), but, with the advent of digital media, has evolved to apply to mid-length CDs and music downloads. EPs are considered "less expensive and less time-consuming" for an artist to produce than an album, and have long been popular with punk and indie bands.