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Page Last Modified: September 19, 2000
| OA | OB | OC | OD | OE | OF | OH | OI | OK | OL | OM | ON | OP | OR | OS | OT | OU | OV | OX | OY | OZ |
| Index entry | NAICS Code | U.S. NAICS Title |
|---|---|---|
| OSB (oriented strandboard) manufacturing | 321219 | Reconstituted Wood Product Manufacturing |
| Oscillators (e.g., instrument type audiofrequency and radiofrequency) manufacturing | 334515 | Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals |
| Oscilloscopes manufacturing | 334515 | Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals |
| Osmium mining and/or beneficiating | 212299 | All Other Metal Ore Mining |
| Osmometers manufacturing | 334516 | Analytical Laboratory Instrument Manufacturing |
| Ossein manufacturing | 325998 | All Other Miscellaneous Chemical Product and Preparation Manufacturing |
| Osteopathic hospitals | 622110 | General Medical and Surgical Hospitals |
| Osteopathic physicians' (except mental health) offices (e.g., centers, clinics) | 621111 | Offices of Physicians (except Mental Health Specialists) |
| Ostrich production | 112390 | Other Poultry Production |
| OA | OB | OC | OD | OE | OF | OH | OI | OK | OL | OM | ON | OP | OR | OS | OT | OU | OV | OX | OY | OZ |