| 44816 | Airers, towel, electric, domestic | |
| 54210 | Airfield aprons, general construction of | |
| 67710 | Airfield ground services | |
| 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, groundwater assessment for the construction of | |
| 83312 | Airfield runways, integrated engineering services for the construction of | |
| 83342 | Airfield runways, mechanical engineering design services for the construction of | |
| 83332 | Airfield runways, mechanical installation appraisal of | |
| 83392 | Airfield runways, other engineering services for the construction of | |
| 83322 | Airfield runways, project management services concerning the construction of | |
| 83342 | Airfield runways, specialty engineering design services for the construction of | |
| 83342 | Airfield runways, structural engineering design services for the construction of | |
| 83392 | Airfield runways, structural failure investigation of | |
| 83332 | Airfield runways, structural installation appraisal of | |
| 83352 | Airfield runways, technical inspection services during the construction of | |
| 83392 | Airfield runways, undertaking contamination studies of | |
| 83332 | Airfield runways, undertaking environmental impact studies of | |
| 83332 | Airfield runways, undertaking project impact studies of | |
| 83332 | Airfield runways, undertaking technical feasibility studies of | |
| 54210 | Airfield taxiways, general construction of | |
| 44730 | Airguns (incl. those operated with other gases) | |
| 67813 | Airline reservation services | |
| 63230 | Airlines, food preparation and supply services to | |
| 68111 | Airmail service, postal | |
| 64314 | Airport limousine services, interurban | |
| 64312 | Airport limousine services, suburban | |
| 64312 | Airport limousine services, urban | |
| 67710 | Airport operation services (excl. cargo handling) | |
| 64321 | Airport shuttle services, non-scheduled | |
| 67720 | Airport-located radar stations, services of | |
| 67710 | Airports, operation of (excl. cargo handling) | |
| 49640 | Airscrews | |
| 49612 | Airships, whether or not rigid | |
| 84131 | Air-to-ground telecommunications services | |
| 43251 | Airwheels, windmill | |