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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 |
|---|---|---|
| ODs' (doctors of optometry) offices (e.g., centers, clinics) | 621320 | Offices of Optometrists |
| OA | OB | OC | OD | OE | OF | OH | OI | OK | OL | OM | ON | OP | OR | OS | OT | OU | OV | OX | OY | OZ |