MAV Class 242 was a 4-4-4T steam locomotive of Hungarian State Railways. A small class of only four examples they were built between 1936 and 1939. They were highly unusual in that they were both streamlined as was the fashion of that period for fast express service but they were also tank locomotives. 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?
Mean Of Transportation