Harold Arlen (February 15, 1905 – April 23, 1986) was an American composer of popular music. Having written over 500 songs, a number of which have become known the world over. In addition to being the composer of The Wizard of Oz, Arlen is a highly regarded contributor to the Great American Songbook. His 1938 song "Over the Rainbow” was voted the twentieth century's No. 1 song by the Recording Industry Association of America (RIAA) and the National Endowment for the Arts (NEA).