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. HAL HTT-40 - The Hindustan Turbo Trainer-40 aircraft project is a Hindustan Aeronautics Ltd (HAL) proposal for an indigenous replacement for the Indian Air Force's retired HPT-32 Deepak as a basic trainer.
Mean Of Transportation