AT&T Inc., headquartered in Dallas, Texas, is an American multinational telecommunications conglomerate. It operates through four segments: Communications, WarnerMedia, Latin America, and Xandr. The Communications segment is the largest, contributing nearly 70% of AT&T's revenue, offering wireless and wireline telecom services, video entertainment, broadband, and Internet services to residential and business customers. This segment also sells handsets, accessories, and other devices through various channels. The WarnerMedia segment produces, distributes, and licenses television programming and feature films, operates cable networks, and offers digital media properties. The Latin America segment provides video entertainment, audio programming, and wireless services primarily to residential customers in the region. The Xandr segment offers digital and video advertising services. AT&T also has a significant presence in Mexico and holds a stake in a satellite television provider. The company's research and development division, AT&T Labs, focuses on data science, AI, network and customer experience, open-source, and 5G inventions and research. AT&T Ventures, the company's venture capital arm, invests in innovative technologies, primarily at the seed and Series B stages.