AT&T vs Oracle

AT&T Inc. is an American multinational telecommunications corporation, headquartered at Whitacre Tower in downtown Dallas, Texas. AT&T Inc. began its existence as Southwestern Bell Corporation, one of seven Regional Bell Operating Companies created in 1983 in the divestiture of the American Telephone and Telegraph Company following the 1982 United States v. AT&T antitrust lawsuit. Southwestern Bell changed its name to SBC Communications Inc. in 1995. In 2005, SBC purchased former parent AT&T Corp. and took on its branding, with the merged entity naming itself AT&T Inc. and using the iconic AT&T Corp. logo and stock-trading symbol.

The Oracle Corporation is an American global computer technology corporation, headquartered in Redwood City, California, United States. The company primarily specializes in developing and marketing computer hardware systems and enterprise software products particularly its own brands of database management systems. In 2011 Oracle was the second-largest software maker by revenue, after Microsoft. The company also develops and builds tools for database development and systems of middle-tier software, enterprise resource planning software, customer relationship management software and supply chain management software.