Telephone an Data Systems is a diversified telecommunications service company providing wireless, telephone and broadband services service in 36 states to over 7 million customers through its business units U.S. Cellular and TDS Telecom. It also has ownership in Suttle-Straus a privately held printing company. TDS Telecom, a wireline telecom company with both ILEC and CLEC divisions. TDS also owns an 80% share of cellular company U.S. Cellular, which is the sixth-largest wireless telecom service provider in the U.S.