| 66210 | Air transport services of letters and parcels | |
| 66290 | Air transport services of other freight | |
| 66120 | Air transport services of passengers, non-scheduled | |
| 91134 | Air transport, administrative services related to | |
| 67790 | Air transport, other supporting services for | |
| 66290 | Air transportation of individual articles in specially constructed shipping containers | |
| 66290 | Air transportation of individual packages in specially constructed shipping containers | |
| 96151 | Air, open, projection of motion pictures in | |
| 96152 | Air, open, projection of video tapes in | |
| 83561 | Air, testing and analysis of | |
| 87149 | Aircraft engines, maintenance and repair of | |
| 67790 | Aircraft fire-fighting services | |
| 67790 | Aircraft fire-prevention services | |
| 71332 | Aircraft insurance policies, underwriting of (excluding those owned by individuals) | |
| 71334 | Aircraft insurance policies, underwriting of (including those owned by individuals) | |
| 67910 | Aircraft space, brokerage of | |
| 83569 | Aircraft, certification of | |
| 66400 | Aircraft, freight-carrying, rental and leasing of, with crew | |
| 87149 | Aircraft, maintenance and repair of | |
| 67790 | Aircraft, maintenance and upkeep of, not involving repairs | |
| 83563 | Aircraft, mechanical testing and analysis of | |
| 66400 | Aircraft, passenger-carrying, rental and leasing of, with crew | |
| 83814 | Aircraft, photographing of landscapes and other surfaces from | |
| 83814 | Aircraft, photographing of structures from | |
| 92900 | Aircraft, pilot instruction services for | |
| 66400 | Aircraft, rental of, with operator | |
| 73116 | Aircraft, rental or leasing of, without operator | |
| 81130 | Aircraft, research and experimental development concerning | |
| 67790 | Aircraft, towing of | |
| 54210 | Airfield aprons, general construction of | |
| 67710 | Airfield ground services | |
| 53213 | Airfield runways | |
| 83392 | Airfield runways, corrosion control programmes for | |
| 83342 | Airfield runways, electrical engineering design services for the construction of | |
| 83332 | Airfield runways, electrical installation appraisal of | |
| 83332 | Airfield runways, engineering advisory and pre-design services for the construction of | |
| 54210 | Airfield runways, general construction of | |
| 83392 | Airfield runways, geotechnical engineering services for the construction of | |
| 83392 | Airfield runways, ground water assessment for the construction of | |
| 83312 | Airfield runways, integrated engineering services for the construction of | |