| 1801 | Art Needlework | Company Product |
| 1802 | Art Goods | Company Product |
| 1803 | Artificial Flowers & Plants Agents & Distributors | Company Product |
| 1804 | Argon Gas Distributors | Company Product |
| 1805 | Architectural Light Fittings | Company Product |
| 1806 | Architectural Models | Company Product |
| 1807 | Argon Gas Manufacturers | Company Product |
| 1808 | Architectural Plan Containers | Company Product |
| 1809 | Architectural Photographers | Company Product |
| 1810 | Architectural Ornamental Works | Company Product |
| 1811 | Architectural Glass | Company Product |
| 1812 | Architectural Engineers | Company Product |
| 1813 | Architectural Coatings | Company Product |
| 1814 | Architectural Illustrators | Company Product |
| 1815 | Architectural Graphic Systems | Company Product |
| 1816 | Arc - Gas Tungsten (TIG) Welding Equipment | Company Product |
| 1817 | Arc - Gas Metal (MIG/MAG) Welding Equipment | Company Product |
| 1818 | Arc Welding Equipment | Company Product |
| 1819 | Arc - Plasma Welding Equipment | Company Product |
| 1820 | Architects | Company Product |
| 1821 | Arc Erosion Disintegrators | Company Product |
| 1822 | Architects' Supplies | Company Product |
| 1823 | Arbors | Company Product |
| 1824 | Aquarium Supplies Wholesalers & Manufacturers | Company Product |
| 1825 | Aquarium Supplies Retailers | Company Product |
| 1826 | Aramid Packings | Company Product |
| 1827 | Arc - Automatic Equipment | Company Product |
| 1828 | Arc - Engine Driven Equipment | Company Product |
| 1829 | Arbitration | Company Product |
| 1830 | Aquaculture | Company Product |