Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Telephone and Data Systems, Inc. is a Chicago-based telecommunications service company providing wireless, telephone and broadband services to more than 7 million customers in 36 states through its business units TDS Telecom and U.S. Cellular (NYSE: USM), the sixth-largest wireless service provider in the U.S. It also has ownership in Suttle-Straus, a printing company. TDS Telecom, a wholly owned subsidiary of Telephone and Data Systems, is a telecommunications company that sells telephone and Internet services in rural and suburban communities in 30 states.