Liberty Media Corporation is a holding company that encompasses electronic retailing, media, communications, and entertainment businesses. It is known for its QVC, Encore, Starz, Provide Commerce, Expedia, IAC/InterActiveCorp, and News Corporation brands and companies. The company encompasses the Liberty Interactive and Liberty Capital tracking stock groups. The firm merged with Tele-Communications Incorporated in 1994. Liberty Media Group merged with TCI Ventures Incorporated in 1999. Following the merger of TCI and AT&T in 1999, Liberty Media Group became a tracking stock of AT&T, with shares listed on the New York Stock Exchange (NYSE) under the LMG.A and LMG.B symbols. Liberty Media Corporation split from AT&T in 2001 and was listed on the NYSE under the LMC.A and LMC.B symbols. Its Liberty Interactive and Liberty Capital tracking stocks currently are listed on NASDAQ under the LINTA, LINTB, LCAPA, and LCAPB symbols. Liberty Media merged with Ascent Media Group Incorporated and Liberty Satellite & Technology Incorporated in 2003. In 2004, the firm established the Liberty Media International Incorporated business. That company is listed on NASDAQ under the LBTYA and LBTYB symbols. In 2005, Liberty Media spun off Ascent Media Group and Discovery Communications Incorporated, forming the Discovery Holding Company. That firm was listed on NASDAQ under the DISCA and DISCB symbols.