The Service Tree lists all services in "branched" groups, starting with the very general and moving to the very specific. Click on the name of any group name to see the sub-groups available within it. Click on a service code to see its details and the providers who offer that service.
Air Transportation
Tracts of land or water that have been adapted and maintained for the landing and takeoff of aircraft. Airports are equipped with hangars or tie-downs, refueling and maintenance facilities and terminals which have passenger accommodations; and often operate telephone lines or special radio channels which provide information about current airport conditions including parking. Included are commercial service airports, municipal airports, privately-owned community airports, and joint-use military/civilian airfields.