| 481 | Oil Flowmeters | Company Product |
| 482 | Online Marketing Campaign | Company Product |
| 483 | Oil Rectifiers | Company Product |
| 484 | Oil Flushing Services | Company Product |
| 485 | Office Sofa | Company Product |
| 486 | Orbital Welding | Company Product |
| 487 | Office Meeting Tables | Company Product |
| 488 | Office Cabinets | Company Product |
| 489 | Office System Furniture | Company Product |
| 490 | Office Maintenance Services | Company Product |
| 491 | Office Furniture Accessories | Company Product |
| 492 | Office Equipment | Company Product |
| 493 | Other Basic Construction Materials | Company Product |
| 494 | Operable & Relocatable Walls | Company Product |
| 495 | Off The Road Tyres | Company Product |
| 496 | ORP Transmitters | Company Product |
| 497 | Oil Filled Transformers | Company Product |
| 498 | Office Tables | Company Product |
| 499 | O-rings Seals | Company Product |
| 500 | Oil, Grease Seals | Company Product |
| 501 | Office Plastic Trays | Company Product |
| 502 | Open Plan System Partitions | Company Product |
| 503 | Operable & Relocatable Wall Partitions | Company Product |
| 504 | Oxygen Sensors | Company Product |
| 505 | Oxygen Packings | Company Product |
| 506 | Oxytetracycline | Company Product |
| 507 | Oyster Sauce Manufacturers | Company Product |
| 508 | Oxygen Gas Distributors | Company Product |
| 509 | Oxygen Level Sensors | Company Product |
| 510 | Oxygen Gas Manufacturers | Company Product |