| 15330 | Asphalt, Trinidad lake | |
| 15330 | Asphaltites | |
| 44180 | Aspirator separators | |
| 48130 | Aspirators, dental | |
| 48150 | Aspirators, medical | |
| 35260 | Aspirin (i.e., acetylsalicylic acid), put up as medicaments in measured doses or in forms or packings for retail sale | |
| 38430 | Assault course climbing walls | |
| 85123 | Assemblers, supplying of, for work assignments | |
| 28310 | Assemblies, furskin, tanned or dressed, in the form of crosses, rectangles or trapeziums (incl. tubular) | |
| 46542 | Assemblies, suspension (rigid- or chain-type), of base metal, for lighting pendants | |
| 44917 | Assembling machines for electric filament or discharge lamps or tubes | |
| 44630 | Assembling machines for shoemaking (excl. sewing-machines) | |
| 44917 | Assembling machines for thermionic or electronic valves or tubes | |
| 44914 | Assembling machines for use in bookbinding | |
| 44222 | Assembling machines for wooden boxes, crates, casks and similar containers | |
| 89121 | Assembling of books | |
| 54400 | Assembly and erection of prefabricated constructions | |
| 54400 | Assembly of prefabricated buildings | |
| 54400 | Assembly of prefabricated structures | |
| 02113 | Asses, live | |
| 83221 | Assessment of urban development programmes | |
| 33690 | Astatine and its isotopes | |
| 16190 | Astrakhanite | |
| 35323 | Astringents, cosmetic | |
| 97990 | Astrologers, services of | |
| 81110 | Astronomy, research and experimental development concerning | |
| 91280 | Asylums, administrative services related to the operation of | |
| 91280 | Asylums, operation of | |
| 14210 | Atacamite | |
| 96610 | Athletes, own-account, services of | |
| 96610 | Athletes, services of | |
| 32240 | Atlases, printed | |
| 43410 | Atomizers for heavy oil | |
| 38994 | Atomizers for perfume, cologne or other scents, of the table or pocket type | |
| 48150 | Atomizers, medical | |
| 35250 | Atropine sulphate, not put up as medicaments | |
| 35250 | Atropine, not put up as medicaments | |
| 35410 | Attar of roses | |
| 82219 | Attestation services, accounting | |
| 34620 | Attractants for use as insecticides | |