Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Now That's What I Call Music 4 (UK series) - This article describes the fourth album in the UK Now! series. It should not be confused with identically-numbered albums from other Now! series. For more information see Now That's What I Call Music! 4 and Now That's What I Call Music! discographyNow That's What I Call Music 4 or Now 4 was released in 1984. The album is the fourth edition of the (UK) Now! series. It is the only album in the series which failed to reach number one on the UK Albums Chart kept off the top by Hits 1.
The answer is:
Album