AllMusic (previously known as All Music Guide or AMG) is an online music guide service website, owned by All Media Network, LLC. AllMusic was founded in 1991 by popular culture archivist Michael Erlewine as a guide for consumers. Its first reference book was published the following year. When first released onto the Internet, AMG predated the World Wide Web and was first available as a Gopher site. In late 2007, Macrovision (now Rovi Corporation) acquired AMG for a reported $72 million.The AMG consumer web properties AllMusic.com, AllMovie.com and AllGame.com were sold by Rovi in July 2013 to All Media Network, LLC. All Media Network, LLC. was formed by the original founders of SideReel.