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. Berger BX-110 - The Berger BX-110 was a prototype light helicopter built in Switzerland in the early 1970s. The single example (registration HB-YAK) was built by Hans Berger a Swiss inventor and helicopter dealer. It was powered by a Wankel automotive engine and remained on the Swiss civil register until 1994. It was of conventional light helicopter configuration with pilot and passenger sitting side-by-side under a large perspex bubble canopy with the tail rotor carried on a tubular boom.
The answer to this question is:
Mean Of Transportation