Given the question: Union Railroad 0-10-2 - Ten Union Railroad 0-10-2 steam locomotives were built in 19361939 by the Baldwin Locomotive Works. These were the only 0-10-2 locomotives ever built in the United States and this purchase gave the name Union to this type.The Union Railroad was a switching and transfer line owned by U.S. Steel serving a number of plants in the area and connecting with six trunk line railroads. Operation was only at low speed thus a leading truck's stability was not required. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
The answer is:
Mean Of Transportation