Please answer the following 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. Atlas XH-1 Alpha - The Alpha XH-1 was a prototype attack helicopter built by Atlas Aviation (now Denel) of South Africa which used it as a concept demonstrator for the then-planned Rooivalk project.
A:
Mean Of Transportation