An album is a collection of audio recordings issued as a single item on CD, record, audio tape or another medium. Albums of recorded music were developed. An extended play record, often referred to as an EP, is a musical recording that contains more tracks than a single, but is usually unqualified as an album or LP. EPs generally do not contain as many tracks as albums, and are considered “less expensive and time-consuming” for an artist to produce than an album. An EP originally referred to specific types of vinyl records other than 78 rpm standard play (SP) and LP, but it is now applied to mid-length CDs and downloads as well.