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Index entryNAICS
Code		U.S. NAICS Title
Open air motion picture theaters 512132 Drive-In Motion Picture Theaters
Opera companies 711110 Theater Companies and Dinner Theaters
Opera hats cut and sewn from purchased fabric (except apparel contractors) 315991 Hat, Cap, and Millinery Manufacturing
Opera hats, men's and boys', cut and sew apparel contractors 315211 Men's and Boys' Cut and Sew Apparel Contractors
Opera hats, women's, girls', and infants', cut and sew apparel contractors 315212 Women's, Girls', and Infants' Cut and Sew Apparel Contractors
Opera singers, independent 711130 Musical Groups and Artists
Operating and launching government satellites 927110 Space Research and Technology
Operating room tables manufacturing 339111 Laboratory Apparatus and Furniture Manufacturing
Operating systems software, computer, packaged 511210 Software Publishers
Operations research consulting services 541614 Process, Physical Distribution, and Logistics Consulting Services
Operative builders of commercial and institutional buildings 233320 Commercial and Institutional Building Construction
Operative builders of manufacturing and industrial buildings 233310 Manufacturing and Industrial Building Construction
Operative builders of multifamily housing 233220 Multifamily Housing Construction
Operative builders of single family housing 233210 Single Family Housing Construction
Ophthalmic agents, uncompounded, manufacturing 325411 Medicinal and Botanical Manufacturing
Ophthalmic goods (except cameras) wholesaling 421460 Ophthalmic Goods Wholesalers
Ophthalmic instruments and apparatus (except laser surgical) manufacturing 339112 Surgical and Medical Instrument Manufacturing
Ophthalmologists' offices (e.g., centers, clinics) 621111 Offices of Physicians (except Mental Health Specialists)
Ophthalmometers and ophthalmoscopes manufacturing 339112 Surgical and Medical Instrument Manufacturing
Opinion research services 541910 Marketing Research and Public Opinion Polling
Opium and opium derivatives (i.e., basic chemicals) manufacturing 325411 Medicinal and Botanical Manufacturing
Optical alignment and display instruments (except photographic) manufacturing 333314 Optical Instrument and Lens Manufacturing
Optical disk drives manufacturing 334112 Computer Storage Device Manufacturing
Optical goods (except cameras) wholesaling 421460 Ophthalmic Goods Wholesalers
Optical goods stores (except offices of optometrists) 446130 Optical Goods Stores
Optical grade calcite mining and/or beneficiating 212399 All Other Nonmetallic Mineral Mining
Optical gun sighting and fire control equipment and instruments manufacturing 333314 Optical Instrument and Lens Manufacturing
Optical instrument repair and maintenance services 811219 Other Electronic and Precision Equipment Repair and Maintenance
Optical lens making and grinding machinery manufacturing 333298 All Other Industrial Machinery Manufacturing
Optical readers and scanners manufacturing 334119 Other Computer Peripheral Equipment Manufacturing
Optical scanning services 514210 Data Processing Services
Optical test and inspection equipment manufacturing 333314 Optical Instrument and Lens Manufacturing
Optoelectronic devices manufacturing 334413 Semiconductor and Related Device Manufacturing
Optometers manufacturing 339112 Surgical and Medical Instrument Manufacturing
Optometric equipment and supplies wholesaling 421460 Ophthalmic Goods Wholesalers
Optometrists' associations 813920 Professional Organizations
Optometrists' offices (e.g., centers, clinics) 621320 Offices of Optometrists

OAOB OCODOE OFOHOI OKOLOM ONOPOR OSOTOU OVOXOY OZ
6/ 5/98