| 601 | Office Cleaning | Company Product |
| 602 | Office Automation Systems | Company Product |
| 603 | Office Automation Equipment | Company Product |
| 604 | Oceanographic Equipment | Company Product |
| 605 | O-tert-butyl-p-cresol | Company Product |
| 606 | Oceanographers | Company Product |
| 607 | O-nitrobenzoic Acid | Company Product |
| 608 | Oil, Petroleum Nozzles | Company Product |
| 609 | Oil Well Drilling Mud | Company Product |
| 610 | Outboard Motors | Company Product |
| 611 | Oxygen Monitors | Company Product |
| 612 | Oil Discharge Monitors | Company Product |
| 613 | Oil Content Monitors | Company Product |
| 614 | Orp Monitors | Company Product |
| 615 | Orp Meters | Company Product |
| 616 | Ohm Meters | Company Product |
| 617 | Optical Measuring Machines | Company Product |
| 618 | Outdoor Lights | Company Product |
| 619 | Outdoor Light Fittings | Company Product |
| 620 | Optical Disc Ultraviolet Curing Lacquers | Company Product |
| 621 | Oil Hoses | Company Product |
| 622 | Ozone Generators | Company Product |
| 623 | Oxygen Generators | Company Product |
| 624 | Office Furniture | Company Product |
| 625 | Outdoor Furniture | Company Product |
| 626 | Oilfield Fishing Tools | Company Product |
| 627 | Oil Filters | Company Product |
| 628 | Office Paper Files | Company Product |
| 629 | Optical Encoders | Company Product |
| 630 | Office Duplicating Machines | Company Product |