Please answer the following question: Class 371 Class 381 and Class 471 were proposed electric multiple unit classes from the Networker family of trains intended to operate services in the south-east of England. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Mean Of Transportation