Given the 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. Queensland A10 Neilson class locomotive - The A10 Neilson class steam locomotive is a 0-4-2 locomotive of the Queensland Railways(QR).The locomotives operated on 1067 mm (3 ft 6 in) gauge. The "A" is used to identify the number of coupled wheels being four coupled wheels for the A10 class followed by numerals indicating the cylinder diameter of ten inches.
The answer is:
Mean Of Transportation