| Value | Category |
|---|---|
| 000 | Accountants and auditors |
| 001 | Actors and actresses |
| 002 | Airplane pilots and navigators |
| 003 | Architects |
| 004 | Artists and art teachers |
| 005 | Athletes |
| 006 | Authors |
| 007 | Chemists |
| 008 | Chiropractors |
| 009 | Clergymen |
| 010 | College presidents and deans |
| 013 | Biological sciences |
| 016 | Engineering |
| 018 | Mathematics |
| 024 | Psychology |
| 027 | Social sciences (n.e.c.) |
| 028 | Nonscientific subjects |
| 029 | Subject not specified |
| 032 | Dentists |
| 034 | Dieticians and nutritionists |
| 035 | Draftsmen |
| 036 | Editors and reporters |
| 042 | Engineers, chemical |
| 043 | Engineers, civil |
| 044 | Engineers, electrical |
| 045 | Engineers, industrial |
| 046 | Engineers, mechanical |
| 048 | Engineers, mining |
| 049 | Engineers (n.e.c.) |
| 051 | Entertainers (n.e.c.) |
| 052 | Farm and home management advisors |
| 054 | Funeral directors and embalmers |
| 055 | Lawyers and judges |
| 056 | Librarians |
| 057 | Musicians and music teachers |
| 058 | Nurses, professional |
| 059 | Nurses, student professional |
| 061 | Agricultural scientists |
| 062 | Biological scientists |
| 068 | Physicists |
| 070 | Optometrists |
| 072 | Personnel and labor relations workers |
| 073 | Pharmacists |
| 074 | Photographers |
| 075 | Physicians and surgeons |
| 076 | Radio operators |
| 077 | Recreation and group workers |
| 078 | Religious workers |
| 079 | Social and welfare workers, except group |
| 081 | Economists |
| 082 | Psychologists |
| 083 | Statisticians and actuaries |
| 084 | Miscellaneous social scientists |
| 091 | Sports instructors and officials |
| 092 | Surveyors |
| 093 | Teachers (n.e.c.) |
| 094 | Technicians, medical and dental |
| 095 | Technicians, testing |
| 096 | Technicians (n.e.c.) |
| 097 | Therapists and healers (n.e.c.) |
| 098 | Veterinarians |
| 099 | Professional, technical and kindred workers (n.e.c.) |
| 100 | Farmers (owners and tenants) |
| 123 | Farm managers |
| 200 | Buyers and department heads, store |
| 201 | Buyers and shippers, farm products |
| 204 | Credit men |
| 210 | Inspectors, public administration |
| 230 | Managers and superintendents, building |
| 240 | Officers, pilots, pursers and engineers, ship |
| 250 | Officials and administrators (n.e.c.), public administration |
| 260 | Officials, lodge, society, union, etc. |
| 270 | Postmasters |
| 280 | Purchasing agents and buyers (n.e.c.) |
| 290 | Managers, officials, and proprietors (n.e.c.) |
| 300 | Agents (n.e.c.) |
| 301 | Attendants and assistants, library |
| 302 | Attendants, physician's and dentist's office |
| 305 | Bank tellers |
| 310 | Bookkeepers |
| 320 | Cashiers |
| 321 | Collectors, bill and account |
| 322 | Dispatchers and starters, vehicle |
| 335 | Mail carriers |
| 340 | Messengers and office boys |
| 341 | Office machine operators |
| 342 | Shipping and receiving clerks |
| 350 | Stenographers, typists, and secretaries |
| 360 | Telegraph messengers |
| 365 | Telegraph operators |
| 370 | Telephone operators |
| 380 | Ticket, station, and express agents |
| 390 | Clerical and kindred workers (n.e.c.) |
| 400 | Advertising agents and salesmen |
| 420 | Demonstrators |
| 430 | Hucksters and peddlers |
| 450 | Insurance agents and brokers |
| 470 | Real estate agents and brokers |
| 480 | Stock and bond salesmen |
| 490 | Salesmen and sales clerks (n.e.c.) |
| 500 | Bakers |
| 502 | Bookbinders |
| 503 | Boilermakers |
| 504 | Brickmasons, stonemasons, and tile setters |
| 505 | Cabinetmakers |
| 510 | Carpenters |
| 511 | Cement and concrete finishers |
| 512 | Compositors and typesetters |
| 513 | Cranemen, derrickmen, and hoistmen |
| 514 | Decorators and window dressers |
| 515 | Electricians |
| 520 | Electrotypers and stereotypers |
| 521 | Engravers, except photoengravers |
| 522 | Excavating, grading, and road machinery operators |
| 523 | Foremen (n.e.c.) |
| 531 | Heat treaters, annealers, temperers |
| 532 | Inspectors, scalers, and graders, log and lumber |
| 533 | Inspectors (n.e.c.) |
| 534 | Jewelers, watchmakers, goldsmiths, and silversmiths |
| 540 | Linemen and servicemen, telegraph, telephone, and power |
| 542 | Locomotive firemen |
| 544 | Machinists |
| 545 | Mechanics and repairmen, airplane |
| 550 | Mechanics and repairmen, automobile |
| 552 | Mechanics and repairmen, radio and television |
| 553 | Mechanics and repairmen, railroad and car shop |
| 554 | Mechanics and repairmen (n.e.c.) |
| 562 | Motion picture projectionists |
| 563 | Opticians and lens grinders and polishers |
| 564 | Painters, construction and maintenance |
| 573 | Plasterers |
| 574 | Plumbers and pipe fitters |
| 575 | Pressmen and plate printers, printing |
| 581 | Roofers and slaters |
| 582 | Shoemakers and repairers, except factory |
| 583 | Stationary engineers |
| 585 | Structural metal workers |
| 590 | Tailors and tailoresses |
| 591 | Tinsmiths, coppersmiths, and sheet metal workers |
| 592 | Tool makers, and die makers and setters |
| 593 | Upholsterers |
| 594 | Craftsmen and kindred workers (n.e.c.) |
| 595 | Members of the armed services |
| 605 | Apprentice mechanics, except auto |
| 615 | Apprentices, trade not specified |
| 621 | Attendants, auto service and parking |
| 622 | Blasters and powder men |
| 624 | Brakemen, railroad |
| 625 | Bus drivers |
| 630 | Chainmen, rodmen, and axmen, surveying |
| 632 | Deliverymen and route men |
| 633 | Dressmakers and seamstresses, except factory |
| 634 | Dyers |
| 635 | Filers, grinders, and polishers, metal |
| 640 | Fruit, nut, and vegetable graders, and packers, except factory |
| 641 | Furnace men, smelter men and pourers |
| 643 | Laundry and dry cleaning operatives |
| 644 | Meat cutters, except slaughter and packing house |
| 645 | Milliners |
| 650 | Mine operatives and laborers |
| 662 | Oilers and greaser, except auto |
| 670 | Painters, except construction or maintenance |
| 671 | Photographic process workers |
| 672 | Power station operators |
| 673 | Sailors and deck hands |
| 674 | Sawyers |
| 680 | Stationary firemen |
| 681 | Switchmen, railroad |
| 682 | Taxicab drivers and chauffeurs |
| 683 | Truck and tractor drivers |
| 685 | Welders and flame cutters |
| 690 | Operative and kindred workers (n.e.c.) |
| 700 | Housekeepers, private household |
| 710 | Laundresses, private household |
| 720 | Private household workers (n.e.c.) |
| 730 | Attendants, hospital and other institution |
| 731 | Attendants, professional and personal service (n.e.c.) |
| 732 | Attendants, recreation and amusement |
| 740 | Barbers, beauticians, and manicurists |
| 750 | Bartenders |
| 751 | Bootblacks |
| 753 | Charwomen and cleaners |
| 754 | Cooks, except private household |
| 760 | Counter and fountain workers |
| 761 | Elevator operators |
| 762 | Firemen, fire protection |
| 763 | Guards, watchmen, and doorkeepers |
| 764 | Housekeepers and stewards, except private household |
| 770 | Janitors and sextons |
| 771 | Marshals and constables |
| 773 | Policemen and detectives |
| 780 | Porters |
| 781 | Practical nurses |
| 782 | Sheriffs and bailiffs |
| 784 | Waiters and waitresses |
| 790 | Service workers, except private household (n.e.c.) |
| 810 | Farm foremen |
| 820 | Farm laborers, wage workers |
| 830 | Farm laborers, unpaid family workers |
| 840 | Farm service laborers, self-employed |
| 910 | Fishermen and oystermen |
| 930 | Gardeners, except farm, and groundskeepers |
| 940 | Longshoremen and stevedores |
| 960 | Teamsters |
| 970 | Laborers (n.e.c.) |
| 999 | NIU (not in universe) |
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