Given the question: 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. TT Class 8 -  TT Class 8 are the only remaining trams used on the Trondheim Tramway. Built by Linke-Hofmann-Busch (LHB) in 1984–85 they replaced the aging Class 7 trams used by Trondheim Trafikkselskap (TT). Of the eleven built nine remain in service on the Gråkallen Line operated by Veolia Transport Bane.
The answer is:
Mean Of Transportation