The Color Bars is a ubiquitous test pattern created by SMPTE. It is mainly used on television but also appears on home video from time to time, such as at the start of early Media-Home Entertainment tapes and at the end of early Columbia Pictures Home Entertainment tapes. The duplicators that used this most often were Media-Home Entertainment and Columbia Pictures Videocassette Services, though sometimes Rank Video Services America has also been known to use a black and white version or a different test pattern instead of its regular one.