MCA, Inc. (or Music Corporation of America) was an American media company. Initially starting in the music business, the company next became a dominant force in the film business, and later expanded into the television business. MCA published music, booked acts, ran a record company, represented film, television and radio stars, and eventually produced and sold television programs to the three major television networks, but had an especially good relationship with NBC. MCA, Inc., is the legal predecessor of NBCUniversal, which since March 2013 is a wholly owned subsidiary of Comcast. MCA's other legal successor is Vivendi, owner of MCA's former music assets, now known as Universal Music Group (which has absorbed PolyGram and EMI) and Universal Music Publishing Group.