| 2912 | Angle valves, industrial type, manufacturing | |
| 3312 | Angle-of-attack instrumentation, manufacturing | |
| 3312 | Angle-of-yaw instrumentation, manufacturing | |
| 5142 | Angles, rods and bars, steel, wholesale | |
| 9191 | Anglican church | |
| 1410 | Anhydrite mining | |
| 2412 | Anhydrous ammonia, manufacturing | |
| 1520 | Anhydrous butterfat, manufacturing | |
| 2430 | Anidex fibres and filaments, manufacturing | |
| 2411 | Aniline, manufacturing | |
| 8520 | Animal ambulance services | |
| 2411 | Animal black, manufacturing | |
| 9111 | Animal breeders association | |
| 0140 | Animal breeding services (except cattle, hogs, sheep, goats and poultry) | |
| 7514 | Animal control services | |
| 9233 | Animal exhibits, live | |
| 1511 | Animal fats and oils, edible, refining from purchased fats and oils | |
| 1514 | Animal fats and oils, inedible, refining from purchased fats and oils | |
| 5121 | Animal feed (except pet food), wholesale | |
| 1520 | Animal feed, dry milk products for, manufacturing | |
| 1533 | Animal feed, prepared (except dogs and cats), manufacturing | |
| 1511 | Animal feed, processing dead stock or carrion for | |
| 1511 | Animal feed, slaughtering animals (except poultry and small game) for | |
| 1711 | Animal fibre yarn, spooling, twisting or winding purchased yarn | |
| 5239 | Animal foods, pet, retail | |
| 5121 | Animal hair, wholesale | |
| 8520 | Animal hospitals | |
| 0140 | Animal husbandry service | |
| 6603 | Animal insurance | |
| 0140 | Animal judging service | |
| 0140 | Animal pedigree service | |
| 7513 | Animal quarantine service, federal government | |
| 9199 | Animal rights organizations | |
| 9233 | Animal safari park | |
| 0140 | Animal semen collection, production and storage services | |
| 0140 | Animal shelters | |
| 0150 | Animal trapping, commercial | |
| 0150 | Animal trapping, wild, for zoo or game farm | |
| 2899 | Animal traps, metal (except wire), manufacturing | |
| 9199 | Animal welfare associations or leagues | |