Q:Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. United Internet -  United Internet AG is a German Internet services company. With 2.91 million DSL customer contracts it is a leading ISP in Germany. It is headquartered in Montabaur Rhineland-Palatinate. Since 2003 it is listed on the TecDAX.
A:
Company