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AT&T Inc. is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's fourth-largest telecommunications company by revenue and the largest wireless carrier in the United States. AT&T provides a wide range of products and services to consumers and businesses, including wireless and wired communications, internet access, television, and digital media. The company also offers a variety of business solutions, such as cloud computing, cybersecurity, and managed services. AT&T is a major player in the telecommunications industry and its products and services touch the lives of millions of people around the world.