
Extended play (EP) is a name given to CDs and records which contain more music than a single, but are too short to be called a music album. EPs usually have about 15 to 30 minutes of music, singles have less than 10 minutes and albums have about 25 to 80 minutes of music.[source?]
Mini-albums and EPs are shorter than full-length albums and usually contain four or five songs [...] They are less expensive and time-consuming in production than albums, and they help to popularize new groups who otherwise lack the number of songs required for a full-length album.
An EP stands for "Extended Play" and refers to a music recording that is longer than a single but contains fewer tracks than an album or LP. Nowadays, EPs contain around 4–5 songs and are considered a more cost-effective ... way of producing and releasing music compared to an album. Additionally, an EP tends to be less cohesive and more non-committal...
"Extended play," a format comprising eight or fewer songs...