E.P. or Extended Player is a is a vinyl record, CD, or music download, which contains more audio than a single but is too short to qualify as an album or L.P.
For vinyl, an E.P. is typically 10 to 28 minutes of music and released as either a 33 1/3 or 45 r.p.m. 12” or a 33 1/3 or 45 r.p.m. 7”, or 10” at either speed.