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. Mil V-12 - The Mil V-12 (NATO reporting name Homer) given the project number Izdeliye 65 remains the largest helicopter ever built. The designation Mi-12 would have been the name for the production helicopter and was not applied to the V-12 prototypes.
A:
Mean Of Transportation