| 87141 | Auto body repair and related services | |
| 86931 | Auto parts, recycling of | |
| 85400 | Automated packaging services | |
| 83393 | Automation of industrial processes, the, corrosion control programmes for | |
| 83343 | Automation of industrial processes, the, electrical engineering design services for | |
| 83333 | Automation of industrial processes, the, electrical installation appraisal of | |
| 83333 | Automation of industrial processes, the, engineering advisory and pre-design services for | |
| 83393 | Automation of industrial processes, the, geotechnical engineering services for | |
| 83393 | Automation of industrial processes, the, ground water assessment for | |
| 83313 | Automation of industrial processes, the, integrated engineering services for | |
| 83343 | Automation of industrial processes, the, mechanical engineering design services for | |
| 83333 | Automation of industrial processes, the, mechanical installation appraisal of | |
| 83393 | Automation of industrial processes, the, other engineering services for | |
| 83323 | Automation of industrial processes, the, project management services concerning | |
| 83343 | Automation of industrial processes, the, specialty engineering design services for | |
| 83343 | Automation of industrial processes, the, structural engineering design services for | |
| 83393 | Automation of industrial processes, the, structural failure investigation of | |
| 83333 | Automation of industrial processes, the, structural installation appraisal of | |
| 83353 | Automation of industrial processes, the, technical inspection services during | |
| 83393 | Automation of industrial processes, the, undertaking contamination studies of | |
| 83333 | Automation of industrial processes, the, undertaking environmental impact studies of | |
| 83333 | Automation of industrial processes, the, undertaking project impact studies of | |
| 83333 | Automation of industrial processes, the, undertaking technical feasibility studies of | |
| 87141 | Automobile repair | |
| 87141 | Automobile tire repair | |
| 87141 | Automobiles, emergency road services for | |
| 83563 | Automobiles, mechanical testing and analysis of | |
| 83564 | Automobiles, technical inspection of | |
| 91260 | Auxiliary fire brigades, fire prevention services by | |
| 91260 | Auxiliary fire brigades, fire-fighting services by | |
| 67910 | Auxiliary freight transport services n.e.c. | |
| 91240 | Auxiliary military forces, administrative services related to | |
| 91260 | Auxiliary police forces, operation of | |
| 91260 | Auxiliary police, services of | |
| 71332 | Aviation insurance policies, underwriting of | |
| 54699 | Awnings, installation of | |