| 34170 | Acraldehyde | |
| 34170 | Acrolein | |
| 34170 | Acrylaldehyde | |
| 34140 | Acrylic acid and its salts and esters | |
| 34790 | Acrylic polymers in liquid or paste form (incl. emulsions, dispersions and solutions in which the solvent does not exceed 50% by weight of the solution) | |
| 34790 | Acrylo-methacrylic copolymers in liquid or paste form (incl. emulsions, dispersions and solutions in which the solvent does not exceed 50% by weight of the solution) | |
| 34150 | Acrylonitrile (excl. acrylonitrile polymers and copolymers) | |
| 34790 | Acrylonitrile polymers, in primary forms | |
| 35250 | ACTH (hormone), not put up as medicaments | |
| 82400 | Acting as receiver in bankruptcy | |
| 82400 | Acting as trustee in bankruptcy | |
| 33690 | Actinium 228 (mesothorium II) | |
| 33690 | Actinium and its isotopes | |
| 48212 | Actinometers (excl. those consisting simply of two special thermometers combined) | |
| 48251 | Actinometers, consisting simply of two special thermometers combined | |
| 35250 | Actinomycetin, not put up as medicaments | |
| 35250 | Actinomycins, not put up as medicaments | |
| 48120 | Actinotherapy apparatus | |
| 83813 | Action photography services | |
| 38360 | Actions, piano | |
| 96310 | Actors, services of | |
| 71630 | Actuarial services | |
| 71630 | Actuaries, services of | |
| 93191 | Acupuncture services | |
| 34150 | Acyclic monoamines and their salts | |
| 34150 | Acyclic polyamines and their salts | |
| 34130 | Acyclic terpene alcohols | |
| 35310 | Acyl aminopolyglycol ethers of alkylene oxide condensates | |
| 83142 | Adaptation of existing software | |
| 43240 | Adaptor check valve for use in conjunction with couplings, used where shut off is required both upstream and downstream when disconnected | |
| 45280 | Adaptors, channel-to-channel, for connecting two digital computer systems | |
| 37195 | Adaptors, glass, for laboratory use | |
| 93319 | Addicts, rehabilitation of, with accommodation | |
| 48232 | Adding and subtracting devices, pocket-type, operated with a stylus | |
| 45130 | Adding machines | |
| 35430 | Additives, extreme pressure (EP), for lubricating oils | |
| 35490 | Additives, prepared, for cements, mortars or concretes | |
| 35430 | Additives, prepared, for other liquids used for the same purposes as mineral oils | |
| 45160 | Addressing machines for envelopes, invoices, etc., for office use | |
| 85950 | Addressing of envelopes | |