Ute Wenner

T-Systems International GmbH engages in the development, implementation, operation, and marketing of client- and industry-specific solutions in the information processing and telecommunications sectors. These include security, data processing, information management, training, and consulting services. The company was founded on August 30, 2004 and is headquartered in Frankfurt, Germany.

DTM Deutsche Tele Medien GmbH provides telephone directories such as Das Telefonbuch, Das Örtliche, and Gelbe Seiten. The company was founded on November 15, 1954 and is headquartered in Frankfurt, Germany.