Extended play - Wikipedia
https://en.wikipedia.org/wiki/Extended_play
In the 1960s and 1970s, record companies released EP versions of long-play (LP) albums for use in jukeboxes. These were commonly known as "compact 33s" or "little LPs". It was played at 331⁄3 rpm, was pressed on seven-inch vinyl and frequently had as many as six songs. What made them EP-like was that some songs were omitted for time purposes, and the tracks deemed the most …
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