| 17.07.02 | Abacuses |
| 14.03.07 | Abrasive belts and discs for sanders |
| 14.03.07 | Abrasive sheets (sandpaper) |
| 22.01.02 | Accordions |
| 05.07.07 | Acorns |
| 30.05.05 | Acronyms |
| 02.09 | Activities, human |
| 15.05.06 | Adding machines |
| 20.03.06 | Address labels |
| 10.07.04 | Adhesive bandage strips |
| 20.01.07 | Adhesive tape (not in dispensers) |
| 20.01.07 | Adhesive tape dispensers |
 | Advertising |
| 24.09.07 | Banners |
| 07.13.01 | Billboards |
| Signs |
| 07.13.02 | Alone |
| 07.13.03 | Mounted with posts or standards |
| 01.15.06 | Skywriting |
| Aerators, soil |
| 15.01.08 | Motorized |
| 14.07.25 | Non-motorized |
| 19.07.16 | Aerosol cans |
| 01.17.05 | Africa (map of) |
| Agricultural implements (non-motorized) |
| 14.07.05 | Plows |
| 14.07.03 | Rakes |
| 14.07.01 | Shovels |
| 14.07.04 | Sickles, scythes |
| 14.07.01 | Spades |
| 14.07.06 | Water sprinklers |
| 15.01.08 | Agricultural machines |
| 18.05 | Agricultural vehicles |
| Air cleaner filters |
| 15.01.04 | Automotive |
| 13.03.25 | Household (furnace, a/c, etc) |
| 13.03.25 | Air conditioners |
| 14.05.08 | Air hammers, jackhammers |
| 14.01.02 | Air hoses |
| 12.01.02 | Air mattresses (camping) |
| 18.09 | Air or space vehicles |
| Air pumps |
| 15.01.25 | Motorized |
| 14.05.25 | Non-motorized |
| 19.07.25 | Air tanks, portable |
| 18.07.10 | Aircraft carriers |
| 18.09.01 | Airplanes |
| 16.01.25 | Alarms (fire, burglar, etc) |
| Albums |
| 16.01.05 | Phonograph records |
| 20.05.02 | Photograph |
| 05.13.02 | Algae |
| 03.21.05 | Alligators |
| 03.03.07 | Alpacas |
| 15.01.04 | Alternators |
| 18.05.12 | Ambulances |
| 24.09.05 | American flag |
| 02.07.23 | Amish people |
| 23.03 | Ammunition |
| 24.19.14 | Ampersands |
| 18.07.16 | Amphibious vehicles |
| 07.09.05 | Amphitheaters |
| 16.01.04 | Amplifiers, sound |
| 21.03.14 | Amusement park rides |
| 21.03.14 | Amusement parks |
| 18.11.05 | Anchors |
| 02.07.73 | Angels |
| 02.07.71 | " |
| 03 | Animals |
| 03.13 | Body parts (mammal, primate (excluding humans)) |
| 27.01.02 | Composed of letters or numerals |
| 04.07 | Composed of plants, objects, or geometric figures |
| 27.03.03 | Forming letters or numerals |
| 04.05 | Mythological or legendary |
| 03.25 | Prehistoric |
| 21.01.11 | Stuffed |
| 24.13.25 | Ankh crosses |
| 16.01.04 | Answering machines, telephone |
| 03.07.07 | Antelopes |
| 16.01.01 | Antennas |
| 03.13.03 | Antlers |
| 03.23.11 | Ants |
| 14.05.25 | Anvils |
| 07.01.05 | Apartment houses |
| 03.11.01 | Apes |
| 05.01.08 | Apple trees |
| 05.09.05 | Apples |
| 17.01.25 | Appliance timers |
| 15.03 | Appliances, household |
| 11.05 | Appliances, kitchen (small electric) |
| 15.01 | Appliances, mechanical |
| 05.09.06 | Apricots |
| 09.03.14 | Aprons |
| 02.07.62 | People wearing aprons |
| 19.03.01 | Aquariums |
| 28.01.01 | Arabic characters |
| 02.07.89 | Arabs |
| 09.07.08 | Arch supports |
| 21.03.25 | Archery arm guards |
| 23.01.03 | Archery bows |
| 07.09.06 | Arches |
| 07.09.05 | Arenas |
| 12.01.04 | Arm chairs |
| 03.09.07 | Armadillos |
| 23.05 | Armor (wearable) |
| 23.05.02 | Armor suits |
| 18.05.05 | Armored trucks |
| 02.11.08 | Arms (human) |
| 23 | Arms (weapons) |
| 24.15.04 | Arrowheads |
| 24.15 | Arrows |
| 07.03.06 | Art galleries |
| 29.01.01 | Articles of manufacture, miscellaneous |
| 02.07.89 | Artists |
| 02.07.91 | " |
| 20.01 | Artists' materials |
| 09.03.08 | Ascots |
| 10.01.08 | Ashtrays |
| 01.17.02 | Asia (map of) |
| 01.01.07 | Asterisks |
| 01.09.25 | Asteroids |
| 24.19.01 | Astrological symbols |
| 02.07.53 | Astronauts |
| 01.13.25 | Astronomic orbits |
| 02.07.52 | Athletes |
| 06.09.08 | Athletic fields (except stadiums and arenas) |
| 09.07.02 | Athletic shoes |
| 09.03.10 | Athletic supporters |
| 01.13.02 | Atomic models |
| 19.09.12 | Atomizers |
| 01.13.02 | Atoms |
| 19.01.05 | Attache cases |
| 01.17.06 | Australia (map of) |
| 22.01.07 | Autoharps |
| 18.05.01 | Automobiles |
| 24.07 | Awards |
| 07.07.05 | Awnings |
| 14.05.05 | Axes |
| 02.07.04 | Aztec Indians |
