Telephone & Data Systems, Inc. engages in the provision of wire line and cable broadband, video and voice services. It operates through the following segments: U.S. Cellular, Telephone and Data Systems (TDS) Telecom's Wireline and Cable. The U.S. Cellular segment provides service to postpaid and prepaid customers from a variety of demographic segments. The TDS Telecom's Wireline segment operates Wireline and Cable subsidiaries that provide communications services. The Cable segment provides interconnected voice over internet protocol and broadband services, including internet access. The company was founded by LeRoy T. Carlson in 1968 and is headquartered in Chicago, IL.