Occupational Classification System Manual
Major Occupational Groups:
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K About the Occupational Classification System Manual
Code Census Job Title Industries Affected
A095 O.B. scrub nurse 806
A084 O.B. specialist 801,803
A208 O.B. technician 806
A087 O.D. All Industries
D376 O.S.D. clerk 40-47
K446 O.T. aide 806
C275 O.T.C. clerk 62,67
F756 Oakes-machine operator 302-306
A199 Oarsman 791,794,799
A225 Observer 13
F766 Observer 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
D348 Observer 481
K416 Observer Forest Service 08
A216 Observer Weather Bureau 95
A095 Obstetrical nurse All Industries
A084 Obstetrician 801,803
B027 Occupational analyst All Industries
A095 Occupational health nurse All Industries
A084 Occupational medicine specialist 801,803
A095 Occupational nurse All Industries
A084 Occupational physician All Industries
A099 Occupational therapist All Industries
K446 Occupational therapy aide All Industries
B015 Occupational therapy director All Industries
A208 Occupational therapy technician All Industries
A075 Oceanographer 899
A074 Oceanographic meteorologist All Industries
K446 Ocular-care aide All Industries
A208 Ocular-care technician All Industries
A208 Ocular-care technologist All Industries
A084 Oculist 801,803
H878 Odd bundle worker 21
H889 Odd-job laborer All Industries
L407 Odd jobs, day worker 88
H889 Odd jobs, exc. day worker 88
I479 Odd jobs, n. s. 01,02,071,072,075,076
H486 Odd jobs, n. s. 078
H869 Odd jobs, n. s. 15-17
F777 Odd jobs, n. s. 20-39
K453 Odd jobs, n. s. 734
H889 Odd jobs, n. s. Any not listed above
F745 Odd-shoe boy or girl 313,314
D389 Odd-ticket boy 301-306
H878 Off-bearer 20-39
H883 Offal icer, poultry 201
E686 Offal man, exc. poultry 201
H883 Offal man, poultry 201
F745 Offal roller 313,314
F786 Offal separator 20
F745 Offal trimmer 313,314
D379 Office boy 801-804
D357 Office boy Exc. 801-804
K453 Office cleaner All Industries
D313 Office clerk-secretary All Industries
D379 Office clerk, n. s. All Industries
D356 Office copy selector 27
D326 Office correspondent All Industries
D379 Office employee All Industries
D379 Office girl, routine 801-804
D357 Office girl, routine Exc. 801-804
D379 Office man All Industries
D357 Office messenger All Industries
A095 Office nurse, registered All Industries
K447 Office nurse, n. s. 801,803
K446 Office nurse, n. s. Exc. 801,803
D313 Office secretary All Industries
K453 Office sweeper All Industries
D337 Office work and bookkeeper All Industries
D315 Office worker, filing, typing All Industries
D379 Office worker, n.s. All Industries
E538 Office-machine installer All Industries
D347 Office-machine operator All Industries
E538 Office-machine service All Industries
A065 Office-system analyst All Industries
B025 Officer 60,61
B005 Officer Customhouse 93
G828 Officer Merchant Marine 44
K418 Officer Police department 92
A177 Officer Salvation Army 832,839
B025 Official 60,61
B014 Official 821,822,824,835
A177 Official 866
B005 Official 91,93-97
B005 Official 92
A177 Official Salvation Army 832,839
B022 Official Any not listed above
K469 Official greeter Resort hotel 701
F734 Offset plate maker 27
F734 Offset pressman 272-279
F734 Offset printer 272-279
F734 Offset-camera operator 272-279
D345 Offset-duplicating-machine operator,
clerical All Industries
F734 Offset-duplicating-machine operator,
printing All Industries
F734 Offset-machine operator 27
F734 Offset-press operator 272-279
D345 Offsetting-machine hand All Industries
B018 Oil agent 13
A225 Oil analyst 291
F766 Oil boiler All Industries
G804 Oil deliverer 517
E613 Oil developer 13
G843 Oil dispatcher 13,291,46
D359 Oil dispatcher 481,482,489
C243 Oil distributor 517
E614 Oil driller 13
A073 Oil expert 13,291
H889 Oil extractor 33-37(exc.348),40,763,764,7692,7699
E699 Oil gager All Industries
E534 Oil heater installer All Industries
H869 Oil heaterman 15-17
F756 Oil mixer 291
B022 Oil operator OWN 13
E613 Oil operator PR 13
A188 Oil painter 899
B022 Oil producer OWN 13
E613 Oil producer PR 13
G859 Oil pumper 13
E699 Oil pumper 291
E696 Oil pumper Exc. 13,291
F757 Oil recovery unit operator All Industries
E699 Oil refiner All Industries
A225 Oil scout 13
F757 Oil separator 33-37(exc.348),40,763,764,7692,7699
C255 Oil speculator 62,67
A225 Oil tester 13,291
F757 Oil treater 13
F777 Oil treater 291
E534 Oil-burner installer All Industries
F766 Oil-burner man 333-339
E534 Oil-burner technician All Industries
E599 Oil-distributor tender 15-17
F777 Oil-expeller operator 20-39
E614 Oil-field caser 13
G859 Oil-field pumper All Industries
A225 Oil-field tester 13
E617 Oil-field worker 13
E613 Oil-field-rig builder OWN 13
E599 Oil-field-rig builder PR 13
E534 Oil-furnace installer All Industries
D365 Oil-house attendant 40
D365 Oil-house man All Industries
A225 Oil-laboratory analyst 291
C255 Oil-lease broker 62,67
B018 Oil-lease buyer PR 13
B022 Oil-lease operator OWN 13
B018 Oil-lease operator PR 13
E519 Oil-pit attendant 40
A225 Oil-prospecting observer 13
G804 Oil-spraying-machine operator 01,02,07(exc.074)
E594 Oil-spreader operator 15-17
H887 Oil-tank-car cleaner All Industries
G828 Oil-tanker captain 44
G804 Oil-transport driver All Industries
G804 Oil-truck driver All Industries
E614 Oil-well driller 13
E615 Oil-well gun perforator operator 13
A225 Oil-well logger 13
G859 Oil-well pumper 13
G859 Oil-well service operator 13
E615 Oil-well shooter 13
G833 Oiler 44
E519 Oiler Exc. 44
E519 Oiler-bander 22
F777 Oiling-machine operator 311
E519 Oilman 40
A165 Old-coin dealer 593,5948,5993-5995,5999
B029 Old-gold buyer 509(exc.5093)
B027 Older-worker specialist Employment Service 94
E688 Oleomargarine maker 207,209
A077 Olericulturist All Industries
F797 Olive brine tester All Industries
F799 Olive grader 203,207,209
I479 Olive knocker 01,071,072,075,076
H888 Olive packer 203,207,209
I479 Olive picker 01,071,072,075,076
F777 Olive pitter 203,207,209
F757 Oliver-filter operator All Industries
E647 Oliving-machine operator 387
B005 Ombudsman 91-97
I488 Onion tier 01,071,072,075,076,514,515,5191
F799 Onion tier Any not listed above
I479 Onion topper 01,071,072,075,076
F735 Opaquer 272-279
F789 Opaquer 3827,384,385
F777 Open developer operator All Industries
F738 Open winder 221-224,228
H889 Open-hearth laborer 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
F766 Open-hearth man 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
F766 Open-hearth melter 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
F766 Open-hearth-furnace operator 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
F777 Open-soaper tender 22
F777 Opener tender All Industries
H878 Opener, hat & cap 225,231-238
H889 Opener, n. s. 22,261-263
F748 Opener, n. s. 721
B036 Opener, n. s. Customs service 93
F777 Opener, n. s. Any not listed above
A186 Opera singer 781-783,792
A095 Operating-room nurse 806
K447 Operating-room orderly 806
A208 Operating-room technician 806
D364 Operations agent 45
B036 Operations agent FAA 96
A065 Operations analyst All Industries
E503 Operations chief, tank and amphibian
tractor All Industries
D389 Operations clerk All Industries
B022 Operations coordinator 45
B025 Operations officer All Industries
A065 Operations research analyst All Industries
C243 Operations superintendent 52-59
Operator
I475 —With class of worker exc. OWN 01,02
E617 —With class of worker exc. OWN 10-14
G824 —With class of worker exc. OWN 411,413-417,exc. bus co.
D348 —With class of worker exc. OWN 481
D353 —With class of worker exc. OWN 482,489
E695 —With class of worker exc. OWN 491
E694 —With class of worker exc. OWN 495
C243 —With class of worker exc. OWN 554
F748 —With class of worker exc. OWN 721
F773 —With class of worker exc. OWN 781-783,792
B015 —With class of worker exc. OWN 805
K457 —With class of worker exc. OWN Barbershop 724
K458 —With class of worker exc. OWN Beauty parlor 723
D359 —With class of worker exc. OWN Burglar alarm co. 7381,7382
G808 —With class of worker exc. OWN Bus co. 41(exc.412)
D359 —With class of worker exc. OWN Fire alarm co. 7381,7382
D353 —With class of worker exc. OWN News syndicate 732,733,735,7383-7389
A189 —With class of worker exc. OWN Photo studio 722,729
D353 —With class of worker exc. OWN Railroad station 40
K459 —With class of worker exc. OWN Wired music service 791,794,799
K446 Ophthalmic aide All Industries
E677 Ophthalmic dispenser All Industries
A208 Ophthalmic technician All Industries
A208 Ophthalmic technologist All Industries
A084 Ophthalmologist 801,803
E677 Optical dispenser All Industries
E677 Optical technician All Industries
E677 Optical worker 3827,384,385
F759 Optical-glass silverer All Industries
A069 Optical-instrument specialist All Industries
F704 Optical-lathe operator All Industries
E677 Optician All Industries
K446 Optometric aide All Industries
A208 Optometric technologist All Industries
A087 Optometrist 8042
A204 Oral hygienist 802
A085 Oral pathologist All Industries
A085 Oral surgeon 802
A104 Oral therapist All Industries
I479 Orange picker 01,071,072,075,076
A194 Orator 899
I479 Orchard hand 01,071,072,075,076
I479 Orchard sprayer 01,071,072,075,076
I475 Orchardist GOV,OBI or PR 01,071,072,075,076
I473 Orchardist OBNI 01
A186 Orchestra conductor 781-783,792
A186 Orchestra director 781-783,792
A186 Orchestra leader 781-783,792
A186 Orchestrator 899
I476 Orchid grower GOV,OBI or PR 01,071,072,075,076
I474 Orchid grower OBNI 01,071,072,075,076
H484 Orchid hand 01,071,072,075,076
A176 Ordained minister 866
D327 Order booker All Industries
G804 Order boy 50-59
D374 Order caller All Industries
D368 Order checker All Industries
D327 Order clerk, clerical All Industries
H889 Order clerk, exc. clerical All Industries
K438 Order clerk, food service 58
K438 Order clerk, n. s. 58
D363 Order detailer 20-39
D307 Order dispatcher, chief 491,493
D327 Order editor All Industries
D373 Order expediter All Industries
D327 Order filler, clerical All Industries
H878 Order filler, linseed oil 207,209
K438 Order filler, n. s. 58
H877 Order filler, n. s. Exc. 58
H888 Order packer or packager All Industries
H889 Order picker All Industries
D363 Order planner 20-39
H889 Order puller All Industries
H889 Order runner 201
G804 Order runner 50-59
H889 Order selector All Industries
K438 Order taker 58
D327 Order taker Exc. 58
D365 Order tracer All Industries
D327 Order-control clerk, blood bank 807-809
D327 Order-desk man All Industries
D327 Order-make-up man All Industries
D363 Order-schedule clerk All Industries
F777 Ordering machine operator 21
K447 Orderly 805-809
A179 Ordinary 92
G829 Ordinary seaman 44
E547 Ordnance artificer 97
E547 Ordnance man All Industries
G849 Ore bridge operator 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
B033 Ore buyer All Industries
F766 Ore charger Zinc pt333,334,3351,3356-7,pt336,339
F768 Ore crusher 10,12
E617 Ore digger 10,12
F766 Ore dryer 333-339
H889 Ore fielder 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
F799 Ore grader 10,12
E615 Ore miner, blasting 10,12
E616 Ore miner, n. s. 10,12
F756 Ore mixer 331,332,pt333,334,pt335,pt336,339,
34(exc.348)
H876 Ore puncher 44
F766 Ore roaster 33-37(exc.348),40,763,764,7692,7699
F798 Ore sampler All Industries
F766 Ore smelter 33-37(exc.348),40,763,764,7692,7699
A225 Ore tester 10
G848 Ore trimmer 44
F757 Ore washer 10,12
F766 Ore-storage-drier man 33-37(exc.348),40,763,764,7692,7699
H889 Oreman 333-339
E636 Organ builder 39(exc.394)
E535 Organ fixer 763,764,7692,7699
A194 Organ grinder 791,794,799
E535 Organ installer All Industries
E535 Organ tuner 763,764,7692,7699
A073 Organic chemist All Industries
A186 Organist All Industries
A167 Organizational psychologist All Industries
C253 Organizer 63,64
B021 Organizer 832,839,861-865,869
A177 Organizer Salvation Army 832,839
H889 Oriental rug stretcher All Industries
A105 Orientation therapist for the blind All Industries
F744 Ornament stitcher 20-30,311,315-319,32-39
F745 Ornament stitcher 313,314
E599 Ornamental iron erector 15-17
E599 Ornamental ironworker 15-17
F717 Ornamental metal worker 20-39
E599 Ornamental metal worker Exc. 20-39
A185 Ornamental metalwork designer All Industries
E579 Ornamental painter All Industries
E584 Ornamental plasterer 15-17
E675 Ornamenter All Industries
A078 Ornithologist All Industries
E678 Orthodontic technician All Industries
A085 Orthodontist 802
A185 Orthopedic designer 3827,384,385
A084 Orthopedic surgeon 801,803
A208 Orthopedic technician All Industries
A208 Orthopedic-brace maker All Industries
K447 Orthopedic-cast specialist 806
C265 Orthopedic-shoe fitter 566
F745 Orthopedic-shoe maker 313,314
E669 Orthopedic-shoe maker Exc. 313,314
A084 Orthopedist 801,803
A208 Orthoptic technician All Industries
A208 Orthoptist All Industries
K446 Orthotic aide All Industries
E684 Orthotics technician All Industries
A208 Orthotist All Industries
A078 Osteologist All Industries
A084 Osteopath 801,803
A084 Osteopathic 806
A084 Osteopathic physician 801,803
A084 Osteopathic resident 806
A084 Otolaryngologist All Industries
A208 Otometric technician All Industries
A084 Otorhinolaryngologist 801,803
D319 Out-patient clerk 806
D316 Out-patient-admitting clerk 806
E509 Outboard motor tester All Industries
E518 Outfitter 373
A174 Outreach worker, associate degree or
higher All Industries
K465 Outreach worker, less than associate
degree All Industries
A194 Outrider Racetrack 791,794,799
F745 Outside cutter 313,314
H889 Outside laborer 10-14
E518 Outside machinist 373
E547 Outside rigger 373
F786 Outsider Furniture 25
F745 Outsole caser 313,314
F745 Outsole cementer 313,314
F745 Outsole compressor 313,314
H878 Outsole flexer 313,314
F745 Outsole handler 313,314
F745 Outsole rounder 313,314
F745 Outsole splicer 313,314
F766 Oven baker 326
E563 Oven builder All Industries
H889 Oven dauber Coke 331
F777 Oven dumper 205
F766 Oven heater Coke 331
H889 Oven laborer Coke 331
G859 Oven loader 205
F796 Oven loader Television tubes 361,362,364,367,369
F763 Oven operator 205,21
F766 Oven operator Exc. 205,21
F763 Oven tender 205,21
F766 Oven tender Exc. 205,21
F763 Oven worker 205,21
F766 Oven worker Exc. 205,21
F763 Ovenman 205,21
F766 Ovenman Exc. 205,21
G804 Over-the-road driver 421,423
F744 Overcaster 20-30,311,315-319,32-39
F745 Overcaster 313,314
F785 Overcoil stepper 387
F785 Overcoiler 387
F744 Overedge-machine operator 20-30,311,315-319,32-39
F745 Overedge-machine operator 313,314
F744 Overedger 20-30,311,315-319,32-39
F745 Overedger 313,314
E505 Overhauler, auto All Industries
E507 Overhauler, bus, truck All Industries
E516 Overhauler, const. equipment All Industries
E518 Overhauler, loom 22,231-238,355,356,358,359
E518 Overhauler, machine 22
H865 Overhauler, n. s. 201
E518 Overhauler, n. s. 355,356,358,359
E505 Overhauler, n. s. 371,527,55,752-754
E519 Overhead cleaner maintainer All Industries
G849 Overhead craneman All Industries
E577 Overhead lineman 491-493,496
E575 Overhead man 781-783,792
G849 Overhead-crane operator All Industries
E567 Overhead-garage-door hanger 15-17
F744 Overlock machine operator All Industries
F744 Overlock operator 20-30,311,315-319,32-39
F745 Overlock operator 313,314
F744 Overlock sewing machine operator All Industries
F744 Overlocker 20-30,311,315-319,32-39
F745 Overlocker 313,314
I477 Overlooker 01,02,071,072,075,076
F744 Overseamer 20-30,311,315-319,32-39
F745 Overseamer 313,314
C243 Owner 50-56,571,572,5731,5734,592-599
B017 Owner 58
A096 Owner 591
B018 Owner 65
E666 Owner 7219
A178 Owner 81
B014 Owner 821
K468 Owner 835
B018 Owner Apartment house 65
B022 Owner Art studio 899
K457 Owner Barbershop 724
K458 Owner Beauty shop 723
E547 Owner Blacksmith shop 763,764,7692,7699
B017 Owner Boardinghouse 702-704
K469 Owner Bootblack stand 725
B014 Owner Business college 824
B028 Owner Cream station 514
K426 Owner Detective agency 7381,7382
I473 Owner Farm OBNI 01,02
H497 Owner Fishing boat 09
B019 Owner Funeral home 726
K469 Owner Guest house 702-704
K469 Owner Lodginghouse 702-704
C277 Owner Mobile food store 5963
B018 Owner Mobile home lot 702-704
A189 Owner Photo studio 722,729
I473 Owner Ranch OBNI 01,02
B018 Owner Real estate 65
B017 Owner Resort 702-704
K469 Owner Rooming house 702-704
E669 Owner Shoe repair shop 725
E667 Owner Tailor shop 56(exc.566)
G809 Owner Taxicab 412
B017 Owner Tourist cabins 701
B017 Owner Tourist camp 702-704
K469 Owner Tourist home 702-704
B018 Owner Trailer park 702-704
B019 Owner Undertaking establishment 726
K434 Owner-bartender 58
B017 Owner-manager 58
G804 Owner-operator 421,423
B017 Owner-operator 58
A226 Owner-pilot 45
F757 Oxidation operator All Industries
F766 Oxide furnace tender All Industries
F789 Oxidizer All Industries
F783 Oxyacetylene burner All Industries
F783 Oxyacetylene cutter All Industries
F783 Oxyacetylene welder All Industries
F783 Oxyacetylene-torch operator All Industries
F766 Oxygen furnace operator All Industries
A098 Oxygen therapist All Industries
K446 Oxygen-equipment aide 806
A208 Oxygen-equipment technician All Industries
F757 Oxygen-plant operator 281,282,286-289
F797 Oxygen-system tester 372
F754 Oxygen-tank filler 281,286,289
A208 Oxygen-therapy technician All Industries
F783 Oxygraph operator All Industries
F783 Oxyhydrogen welder All Industries
B033 Oyster buyer OWN 514
H498 Oyster culler 09
H498 Oyster cultivator 09
H498 Oyster dredger 09
H498 Oyster farmer 09
H498 Oyster fisherman 09
H498 Oyster floater 09
F799 Oyster grader 207,209
H498 Oyster grower 09
H498 Oyster harvester 09
H889 Oyster opener All Industries
H498 Oyster picker 09
H889 Oyster picker 207,209
H498 Oyster planter 09
B033 Oyster shipper 514
H889 Oyster shucker All Industries
H498 Oyster sorter 09
H889 Oyster sorter 207,209
H498 Oyster tonger 09
F764 Oyster washer 207,209
H498 Oysterman 09
F774 Ozalid operator All Industries
Last modified: October 16, 2001
