| OB-GYN doctor's office |
797 |
621111 |
| Oakum (mfg.) |
159 |
314999 |
| Oarlocks (mfg.) |
298 |
332999 |
| Oars, wooden (mfg.) |
387 |
321999 |
| Oast kiln hops |
029 |
115114 |
| Oatmeal (mfg.) |
107 |
311230 |
| Object detection apparatus, electronic (mfg.) |
338 |
334517 |
| Objects of art, antique (ret.) |
549 |
453310 |
| Oboes (mfg.) |
398 |
339992 |
| Observation amusement tower |
859 |
713990 |
| Observatory, U.S. Naval |
959 |
928110 |
| Observatory, exc. U.S. Naval |
746 |
541720 |
| Obstetrician's office |
797 |
621111 |
| Obstetrics, practice of |
797 |
621111 |
| Ocarinas (mfg.) |
398 |
339992 |
| Occupational therapy centers |
809 |
621498 |
| Oceanarium |
857 |
712130 |
| Ocher (ext.) |
047 |
212393 |
| Octaphones (mfg.) |
398 |
339999 |
| Oculist's office |
797 |
621111 |
| Odd jobs (commercial building) cleaning, washing windows, etc. |
769 |
561790 |
| Odd jobs (private families) cleaning floors, buffing and polishing, etc. PR |
929 |
814110 |
| Odd jobs, groundwork, yardwork etc. |
777 |
561730 |
| Odd jobs, house repairs (const.) |
077 |
2332 |
| Off shore drilling (ext.) |
049 |
213111 |
| Off track betting |
859 |
713290 |
| Office automation installation |
738 |
541512 |
| Office building |
707 |
531120 |
| Office building management |
707 |
531120 |
| Office cleaning service |
769 |
561720 |
| Office equipment (ret.) |
548 |
453210 |
| Office equipment (whsl.) |
417 |
421420 |
| Office equipment sales and service (ret.) |
548 |
453210 |
| Office equipment sales and service (whsl.) |
417 |
421420 |
| Office equipment, exc. typewriter (ret.) |
548 |
453210 |
| Office fixtures (mfg.) |
389 |
337214 |
| Office forms (ret.) |
548 |
453210 |
| Office forms (whsl.) |
437 |
422120 |
| Office forms, printing (mfg.) |
199 |
323119 |
| Office furniture (mfg.) |
389 |
337211 |
| Office furniture (ret.) |
477 |
442110 |
| Office furniture (whsl.) |
408 |
421210 |
| Office furniture, new and used (ret.) |
477 |
442110 |
| Office furniture, secondhand (ret.) |
549 |
453310 |
| Office machine control panels (mfg.) |
336 |
334119 |
| Office machines (mfg.) |
309 |
333313 |
| Office machines, exc. typewriters (whsl.) |
417 |
421420 |
| Office management service |
778 |
561110 |
| Office supplies (ret.) |
548 |
453210 |
| Office supplies (whsl.) |
437 |
422120 |
| Office supplies, except paper (mfg.) |
398 |
339942 |
| Officers' club, exc. residential |
917 |
813410 |
| Officers' club, residential |
867 |
721310 |
| Offset paper (mfg.) |
187 |
322121 |
| Offset plates (mfg.) |
319 |
333293 |
| Offset printing (mfg.) |
199 |
323110 |
| Ohmmeters (mfg.) |
338 |
334515 |
| Oil acid (mfg.) |
207 |
324110 |
| Oil and gas (whsl.) |
449 |
422710 |
| Oil and gas lease brokers |
697 |
523999 |
| Oil barge |
609 |
483113 |
| Oil booster station |
627 |
486110 |
| Oil brokers |
697 |
523999 |
| Oil bulk tank station (whsl.) |
449 |
422710 |
| Oil burners (mfg.) |
319 |
333414 |
| Oil burners (ret.) |
487 |
444190 |
| Oil burners (whsl.) |
426 |
421720 |
| Oil cans, metal (mfg.) |
298 |
33291 |
| Oil casing pulling (ext.) |
049 |
213111 |
| Oil change shops |
877 |
811191 |
| Oil company \ n.s. (whsl.) |
449 |
422720 |
| Oil company headquarters, district, and regional offices |
757 |
551114 |
| Oil company, fuel (ret.) |
568 |
454311 |
| Oil cups (mfg.) |
319 |
333911 |
| Oil cycling plant (ext.) |
049 |
213112 |
| Oil delivery (ret.) |
568 |
454311 |
| Oil derrick construction (ext.) |
049 |
213111 |
| Oil dispensing pumps (mfg.) |
319 |
333913 |
| Oil distributor (ret.) |
568 |
454311 |
| Oil distributor (whsl.) |
449 |
422710 |
| Oil drilling (ext.) |
049 |
213111 |
| Oil drilling bits (mfg.) |
308 |
333132 |
| Oil exploration service (ext.) |
049 |
213112 |
| Oil field (ext.) |
049 |
213112 |
| Oil field casing (ext.) |
049 |
213112 |
| Oil field chemical service co. (ext.) |
049 |
213112 |
| Oil field drilling (ext.) |
049 |
213112 |
| Oil field equipment (mfg.) |
308 |
333132 |
| Oil field equipment (whsl.) |
427 |
421830 |
| Oil field machinery (mfg.) |
308 |
333132 |
| Oil field machinery (whsl.) |
427 |
421830 |
| Oil field services (ext.) |
049 |
213112 |
| Oil field tools (mfg.) |
308 |
333132 |
| Oil field tools (whsl.) |
427 |
421830 |
| Oil field warehouse (ext.) |
049 |
213112 |
| Oil filling station (ret.) |
509 |
447190 |
| Oil filters (mfg.) |
319 |
333911 |
| Oil fuel (ret.) |
568 |
454311 |
| Oil furnace (ret.) |
487 |
444190 |
| Oil furnace (whsl.) |
426 |
421720 |
| Oil home heating (ret.) |
568 |
454311 |
| Oil lease buyers |
697 |
523999 |
| Oil lease dealers |
697 |
523999 |
| Oil lease selling |
697 |
523999 |
| Oil line valves (mfg.) |
298 |
332919 |
| Oil measuring pumps (mfg.) |
319 |
333913 |
| Oil paint (mfg.) |
227 |
325510 |
| Oil perforating service (ext.) |
049 |
213112 |
| Oil pipeline |
627 |
486110 |
| Oil plant petroleum (mfg.) |
207 |
324110 |
| Oil production (ext.) |
037 |
21111 |
| Oil products distributing co. (whsl.) |
449 |
422710 |
| Oil properties, leasing |
707 |
531190 |
| Oil pumping station |
627 |
486110 |
| Oil refinery (mfg.) |
207 |
324110 |
| Oil refinery supplies (whsl.) |
427 |
421830 |
| Oil refining equipment (whsl.) |
427 |
421830 |
| Oil refining machinery (mfg.) |
308 |
333132 |
| Oil refining machinery (whsl.) |
427 |
421830 |
| Oil research boat |
729 |
541370 |
| Oil rig construction (ext.) |
049 |
213112 |
| Oil rig repair service (ext.) |
049 |
213112 |
| Oil rigs (ext.) |
049 |
213112 |
| Oil royalty brokers |
697 |
523910 |
| Oil royalty co. |
719 |
533110 |
| Oil royalty dealers |
697 |
523910 |
| Oil sampling service (ext.) |
049 |
213112 |
| Oil sand (ext.) |
037 |
21111 |
| Oil seals (mfg.) |
398 |
339991 |
| Oil shale (ext.) |
037 |
211111 |
| Oil silk waterproofing (mfg.) |
149 |
313320 |
| Oil spill clean up |
779 |
562910 |
| Oil station (ret.) |
509 |
447190 |
| Oil storage tanks (mfg.) |
287 |
332420 |
| Oil stoves (mfg.) |
298 |
332919 |
| Oil structure locating service (ext.) |
049 |
213112 |
| Oil tank (const.) |
077 |
234930 |
| Oil tank cleaning service |
779 |
562910 |
| Oil tanker building (mfg.) |
368 |
336611 |
| Oil tanker repairing (mfg.) |
368 |
336611 |
| Oil tankers, ships |
609 |
483113 |
| Oil tanks (mfg.) |
287 |
332420 |
| Oil terminal (whsl.) |
449 |
422710 |
| Oil tool rental service |
719 |
533110 |
| Oil treating compounds (mfg.) |
229 |
325998 |
| Oil waste (whsl.) |
428 |
421930 |
| Oil well (ext.) |
037 |
211111 |
| Oil well acidizing (ext.) |
049 |
213112 |
| Oil well casing pulling (ext.) |
049 |
213112 |
| Oil well cementing (ext.) |
049 |
213111 |
| Oil well chemical service (ext.) |
049 |
213112 |
| Oil well cleaning (ext.) |
049 |
213111 |
| Oil well drilling (ext.) |
049 |
213111 |
| Oil well equipment (whsl.) |
427 |
421830 |
| Oil well log service (ext.) |
049 |
213111 |
| Oil well machinery (mfg.) |
308 |
333132 |
| Oil well machinery (whsl.) |
427 |
421830 |
| Oil well mud (mfg.) |
229 |
325998 |
| Oil well plugging (ext.) |
049 |
213112 |
| Oil well recycling (ext.) |
049 |
213112 |
| Oil well rig construction (ext.) |
049 |
213112 |
| Oil well rig dismantling (ext.) |
049 |
213112 |
| Oil well rig repairing (ext.) |
049 |
213112 |
| Oil well servicing co. (ext.) |
049 |
213112 |
| Oil well shooting (ext.) |
049 |
213112 |
| Oil well supplies (whsl.) |
427 |
421830 |
| Oil well surveying (ext.) |
049 |
213112 |
| Oil well swabbing (ext.) |
049 |
213111 |
| Oil well testing (ext.) |
049 |
213112 |
| Oil well tools (mfg.) |
308 |
333132 |
| Oil works, petroleum (mfg.) |
207 |
324110 |
| Oil yard, refinery (mfg.) |
207 |
324110 |
| Oilcloth (mfg.) |
149 |
313320 |
| Oiled paper (mfg.) |
189 |
322226 |
| Oiled waterproof garments (mfg.) |
168 |
315231 |
| Oilstones (ext.) |
047 |
212399 |
| Oilstones (mfg.) |
259 |
327991 |
| Ointments (mfg.) |
219 |
325412 |
| Oiticica oil (mfg.) |
107 |
311223 |
| Old folks' home, nonnursing |
829 |
623312 |
| Old folks' home, with nursing care |
827 |
623110 |
| Oleate driers (mfg.) |
227 |
325510 |
| Oleomargarine (mfg.) |
107 |
311225 |
| Oleomargarine (whsl.) |
447 |
422430 |
| Olive curing (mfg.) |
109 |
311421 |
| Olive oil (mfg.) |
107 |
311225 |
| Olives, bottled (mfg.) |
109 |
311421 |
| Olives, brined (mfg.) |
109 |
311421 |
| Olives, dried (mfg.) |
109 |
311423 |
| Olivine (ext.) |
047 |
212325 |
| Olympic committee |
859 |
713940 |
| On-line access service providers |
678 |
514191 |
| On-line bank |
687 |
522110 |
| On-line data base information retrieval |
678 |
514191 |
| Onions, pickled (mfg.) |
109 |
311421 |
| Onyx marble (ext.) |
047 |
212311 |
| Open air theater, exc. motion picture |
856 |
711510 |
| Open air theater, motion picture |
657 |
512132 |
| Open hearth furnace (mfg.) |
267 |
331210 |
| Open pit, coal (ext.) |
038 |
21211 |
| Open pit, iron (ext.) |
039 |
212210 |
| Opera co. |
856 |
711130 |
| Opera glasses (mfg.) |
309 |
333314 |
| Opera hats (mfg.) |
169 |
315991 |
| Operating systems software, computer, packaged |
649 |
511210 |
| Operating tables (mfg.) |
396 |
339111 |
| Operations research consulting service |
739 |
541614 |
| Operative builders, real estate |
077 |
233310 |
| Ophthalmic apparatus (mfg.) |
396 |
339112 |
| Ophthalmic glass (mfg.) |
249 |
327212 |
| Ophthalmic goods (mfg.) |
396 |
339115 |
| Ophthalmic goods (whsl.) |
417 |
421460 |
| Ophthalmic instruments (mfg.) |
396 |
339112 |
| Ophthalmic lamps (mfg.) |
396 |
339112 |
| Ophthalmic lens grinding (mfg.) |
396 |
339115 |
| Ophthalmologist's office |
797 |
621111 |
| Opinion polls |
749 |
541910 |
| Opinion polls, research and services |
749 |
541910 |
| Opium derivatives (mfg.) |
219 |
325411 |
| Optical co. (ret.) |
508 |
446130 |
| Optical comparators (mfg.) |
396 |
339115 |
| Optical department (ret.) |
508 |
446130 |
| Optical disks and tape, blank (mfg.) |
339 |
334613 |
| Optical flats (mfg.) |
396 |
339115 |
| Optical frames (mfg.) |
396 |
339115 |
| Optical glass (mfg.) |
249 |
327212 |
| Optical goods (ret.) |
508 |
446130 |
| Optical goods (whsl.) |
417 |
421460 |
| Optical laboratory (mfg.) |
396 |
339115 |
| Optical laboratory (whsl.) |
427 |
421850 |
| Optical lenses exc. ophthalmic (mfg.) |
309 |
333314 |
| Optical lenses, ophthalmic |
396 |
339115 |
| Optical measuring instruments (mfg.) |
396 |
339115 |
| Optical scanners, computer (mfg.) |
336 |
334119 |
| Optical scanning services |
679 |
514210 |
| Optical storage devices for computers (mfg.) |
336 |
334119 |
| Optician's office (ret.) |
508 |
446130 |
| Optician's store (ret.) |
508 |
446130 |
| Optometers (mfg.) |
396 |
339112 |
| Optometric equipment and supplies (whsl.) |
417 |
421460 |
| Optometrist's store (ret.) |
508 |
446130 |
| Optometrists' offices or clinics |
807 |
621320 |
| Optometry office |
807 |
621320 |
| Oral surgeon's office |
798 |
621210 |
| Orange grove |
017 |
111310 |
| Orange packing house (whsl.) |
447 |
422480 |
| Oranges (whsl.) |
447 |
422480 |
| Orchard |
017 |
111998 |
| Orchard supplies (whsl.) |
457 |
422910 |
| Orchestra |
856 |
711130 |
| Orchestrions (mfg.) |
398 |
339992 |
| Order taking office, mail order house (ret.) |
559 |
454110 |
| Ordnance (mfg.) |
297 |
332995 |
| Ordnance \ n.s. |
297 |
332995 |
| Ordnance and accessories (whsl.) |
429 |
421990 |
| Ordnance testing chambers (mfg.) |
319 |
333999 |
| Ore beneficating plant (ext.) |
039 |
212210 |
| Ore boat |
609 |
483113 |
| Ore crushing machinery (mfg.) |
308 |
333131 |
| Ore crushing mill (ext.) |
039 |
2122 |
| Ore dock, exc. railroad |
629 |
488390 |
| Ore dock, railroad |
608 |
482111 |
| Ore dressing mill (ext.) |
039 |
2122 |
| Ore loaders (mfg.) |
308 |
333131 |
| Ore mixing machinery (mfg.) |
308 |
333131 |
| Ore reduction aluminum (mfg.) |
268 |
331312 |
| Ore sampling service (ext.) |
049 |
213112 |
| Ore screening machinery (mfg.) |
308 |
333131 |
| Ore smelter, copper (mfg.) |
269 |
331421 |
| Ore smelter, lead (mfg.) |
269 |
331491 |
| Ore smelter, zinc (mfg.) |
269 |
331491 |
| Ore washer (ext.) |
039 |
2122 |
| Ore washing machinery (mfg.) |
308 |
333131 |
| Ore washing plant (ext.) |
039 |
212234 |
| Organ bank |
818 |
621991 |
| Organ bank, body |
818 |
621991 |
| Organ donor center, body |
818 |
621991 |
| Organ hardware (mfg.) |
298 |
332510 |
| Organ parts, exc. organ hardware (mfg.) |
398 |
339992 |
| Organ tuning |
888 |
811490 |
| Organdy, cotton (mfg.) |
148 |
313230 |
| Organic chemicals (whsl.) |
438 |
422690 |
| Organic chemicals, exc. medicinal (mfg.) |
229 |
325132 |
| Organic chemicals, medicinal (mfg.) |
219 |
325411 |
| Organization for Econonic Cooperation and Development |
959 |
928120 |
| Organization of American States |
959 |
928120 |
| Organs (mfg.) |
398 |
339992 |
| Organs (ret.) |
529 |
451140 |
| Oriental goods (ret.) |
558 |
453998 |
| Oriental rugs, sales and repair (ret.) |
477 |
442210 |
| Orlon knitting mill (mfg.) |
167 |
315119 |
| Ornamental brass (mfg.) |
287 |
332323 |
| Ornamental glass (mfg.) |
249 |
327212 |
| Ornamental granite (mfg.) |
259 |
327991 |
| Ornamental iron (mfg.) |
287 |
332323 |
| Ornamental iron (whsl.) |
418 |
421510 |
| Ornamental iron and steel work (const.) |
077 |
235990 |
| Ornamental metal grillwork (mfg.) |
287 |
332323 |
| Ornamental metal work (const.) |
077 |
235990 |
| Ornamental metal work (mfg.) |
287 |
332323 |
| Ornamental plants growing |
017 |
111422 |
| Ornamental plaster shop (mfg.) |
257 |
327420 |
| Ornamental structural brasswork (mfg.) |
287 |
332323 |
| Ornamental tree and shrub services |
777 |
561730 |
| Ornamental woodwork (mfg.) |
387 |
321918 |
| Ornaments, Christmas, electric (mfg.) |
349 |
335129 |
| Ornaments, Christmas, exc. electric or glass (mfg.) |
398 |
339999 |
| Ornaments, Christmas, glass (mfg.) |
249 |
327212 |
| Ornaments, costume (mfg.) |
398 |
339999 |
| Ornaments, glass (mfg.) |
249 |
327212 |
| Ornaments, shoe (mfg.) |
179 |
316999 |
| Orphanage |
829 |
623990 |
| Orthodontic appliances (mfg.) |
396 |
339114 |
| Orthodontic equipment (mfg.) |
396 |
339114 |
| Orthodontist's office |
798 |
621210 |
| Orthopedic and artificial limb store (ret.) |
558 |
453998 |
| Orthopedic bandages (mfg.) |
396 |
339113 |
| Orthopedic clinic |
797 |
621111 |
| Orthopedic devices (mfg.) |
396 |
339113 |
| Orthopedic dressings (mfg.) |
396 |
339113 |
| Orthopedic equipment (whsl.) |
417 |
421450 |
| Orthopedic hospital |
819 |
622310 |
| Orthopedic office |
797 |
621111 |
| Orthopedic plaster gypsum (mfg.) |
257 |
327420 |
| Orthopedic shoes (ret.) |
518 |
448210 |
| Orthopedic shoes, exc. extension (mfg.) |
177 |
316214 |
| Orthopedic shoes, extension (mfg.) |
396 |
339113 |
| Orthopedic sundries, molded, rubber (mfg.) |
239 |
326299 |
| Orthoptic training clinic |
809 |
621498 |
| Oscillators (mfg.) |
338 |
334515 |
| Oscillographs (mfg.) |
338 |
334511 |
| Oscilloscopes (mfg.) |
338 |
334515 |
| Osteopathic hospital |
819 |
622110 |
| Osteopathist's office |
797 |
621111 |
| Osteopaths' offices or clinics |
797 |
621111 |
| Ostrich feathers (mfg.) |
398 |
339994 |
| Out-patient clinic for alcoholism |
809 |
621420 |
| Out-patient clinic for drugs |
809 |
621498 |
| Outboard motor dealer (ret.) |
468 |
441222 |
| Outboard motors (mfg.) |
318 |
333618 |
| Outdoor adventure operations |
859 |
713990 |
| Outdoor advertising |
747 |
541850 |
| Outdoor sporting equipment (ret.) |
527 |
451110 |
| Outdoor theater, exc. motion picture |
856 |
711510 |
| Outdoor theater, motion picture |
657 |
512132 |
| Outerwear (whsl.) |
439 |
422320 |
| Outlet boxes (mfg.) |
349 |
335932 |
| Outlets, electric (mfg.) |
349 |
335931 |
| Outplacement services |
749 |
541990 |
| Oven controls (mfg.) |
338 |
334512 |
| Ovens, bakery (mfg.) |
319 |
333294 |
| Ovens, commercial-type (whsl.) |
417 |
421440 |
| Ovens, household, electric (mfg.) |
347 |
335211 |
| Ovens, industrial (mfg.) |
319 |
333994 |
| Ovens, industrial (whsl.) |
427 |
421830 |
| Ovens, portable, exc. household (mfg.) |
309 |
333319 |
| Ovens, portable, household (mfg.) |
347 |
335211 |
| Ovenware pottery (mfg.) |
247 |
327112 |
| Ovenware, cast aluminum (mfg.) |
277 |
331522 |
| Ovenware, enameled (mfg.) |
278 |
332116 |
| Ovenware, glass (mfg.) |
249 |
327212 |
| Overall laundry |
907 |
812320 |
| Overalls (mfg.) |
168 |
315225 |
| Overburden removal services (ext.) |
049 |
213113 |
| Overcoatings, textile (mfg.) |
148 |
313210 |
| Overcoats (mfg.) |
168 |
315222 |
| Overcoats (whsl.) |
439 |
422320 |
| Overhead conveyor systems (mfg.) |
319 |
333922 |
| Overhead doors, metal (mfg.) |
287 |
332321 |
| Overhead doors, wooden (mfg.) |
387 |
321911 |
| Overshoes, plastic or rubber (mfg.) |
177 |
316211 |
| Oxygen (mfg.) |
229 |
325120 |
| Oxygen (ret.) |
558 |
453998 |
| Oxygen (whsl.) |
438 |
422690 |
| Oxygen equipment rental (home use) |
718 |
532291 |
| Oxygen gas (whsl.) |
438 |
422690 |
| Oxygen regulators (mfg.) |
338 |
334513 |
| Oxygen systems, aircraft (mfg.) |
358 |
336413 |
| Oxygen tanks, metal (mfg.) |
287 |
332420 |
| Oxygen tent (mfg.) |
396 |
339112 |
| Oyster bar |
868 |
722110 |
| Oyster bed |
028 |
114112 |
| Oyster boat |
028 |
114112 |
| Oyster boat building (mfg.) |
368 |
336611 |
| Oyster boat repairing (mfg.) |
629 |
488390 |
| Oyster dredging |
028 |
114112 |
| Oyster farm |
028 |
114112 |
| Oyster packing (mfg.) |
128 |
311711 |
| Oyster packing (whsl.) |
447 |
422460 |
| Oyster shed (mfg.) |
128 |
311712 |
| Oyster shells, ground (mfg.) |
107 |
311225 |
| Oyster shucking (mfg.) |
128 |
311712 |
| Oyster tongs (mfg.) |
279 |
332214 |
| Oysters (whsl.) |
447 |
422460 |
| Oysters, canned (mfg.) |
128 |
311711 |
| Oysters, fresh or frozen (mfg.) |
128 |
311712 |
| Ozokerite (ext.) |
047 |
212399 |
| Ozone machines (mfg.) |
309 |
333319 |
