Occupational Title | Brief Number | HOC Code |
| Able Seamen (merchant mariners) | 379 | RES |
| Academic Deans | 93 | SEA |
| Academic Deans-Registrar | 371 | ESC |
| Academic Librarians | 82 | SEC |
| Accountants | 63 | CSI |
| Accountants, Certified Public | 63 | CSI |
| Accountants, Government | 63 | CSI |
| Accountants, Management | 63 | CIE |
| Accountants, Public | 63 | CSI |
| Accountants, Tax | 63 | ECS |
| Account Executives | 433 | ESC |
| Account Executives (advertising agency) | 113 | AES |
| Accounting Clerks (bookkeepers) | 26 | CSR |
| Acquisitions Librarians | 82 | SAI |
| Acquisitions Librarians (health sciences) | 9 | SAI |
| Acrobats (circus performers) | 251 | AER |
| Activated Sludge Operators (water & wastewater treatment) | 517 | REI |
| Actors and Actresses | 205 | AES |
| Actuaries | 346 | ISE |
| Acupressurists (acupuncturists) | 249 | ISR |
| Acupuncturists | 249 | IRE |
| Acute Care Nurses | 75 | SIA |
| Addiction Counselors | 217 | SEA |
| Addiction Psychiatrists | 347 | ISA |
| Addiction Treatment Administrators | 623 | ESA, SEA |
| Adjudications Officers | 105 | no code |
| Adjunct Faculty (college & university faculty members) | 184 | SEI |
| Administrative Assistants (congressional aides) | 525 | ESC |
| Administrative Assistants (secretaries) | 19 | ESC |
| Administrative Managers | 605 | ESR |
| Administrative Officers | 189 | ESA |
| Administrative Support Staff (publishing) | 231 | SEI |
| Administrators, Web | 296 | IRC |
| Admissions Directors, College and University | 65 | ESA |
| Admitting Clerks, Hospital | 448 | ECS |
| Admitting Directors (hospital admitting) | 448 | ESA |
| Admitting Interviewers | 214 | ECS |
| Admitting Managers, Hospital | 448 | ESA |
| Admitting Supervisors (hospital admitting) | 448 | ESA |
| Adult Day-Care Coordinators | 381 | SEA |
| Advance Agents (theatrical production) | 612 | ESR |
| Advertising Agency Workers | 113 | no code |
| Advertising and Promotions Managers (publishing) | 231 | ESA, ESC |
| Advertising Sales Agents (publishing) | 231 | ESR |
| Aerial Artists (circus performers) | 251 | REA |
| Aerial Photographers | 12 | IER |
| Aerobics Instructors (health club fitness) | 282 | SEC |
| Aerodynamics Engineers (aerospace) | 159 | IRE |
| Aeronautical Drafters | 22 | IRC |
| Aeronautical Engineers | 159 | IRS |
| Aeronomers | 148 | IRS |
| Aerospace Engineers | 159 | IRS |
| Aerospace Products and Parts Manufacturing Workers | 509 | no code |
| Agency Managers (advertising) | 113 | AES |
| Agricultural Aircraft Pilots | 411 | IRE |
| Agricultural and Biological Engineers | 176 | IRE |
| Agricultural Chemists | 153 | IRE |
| Agricultural Commodity Graders (consumer safety officers) | 620 | REI |
| Agricultural Supply Sales Representatives | 498 | ESR |
| Agronomists | 179 | IRS |
| Air-Conditioning and Heating Technicians (heating & cooling) | 225 | RES |
| Air-conditioning Repairers (automobile) | 45 | RES |
| Aircraft Inspectors (technicians) | 182 | IRE |
| Aircraft Mechanics | 182 | RIE |
| Aircraft Repair Technicians | 182 | RIE |
| Aircraft Structure, Surfaces, Rigging, & Sys Assemblers (aerospace man | 509 | RCE, RIE |
| Aircraft Technicians | 182 | RIE |
| Air Force Personnel | 439 | no code |
| Airframe Technicians | 182 | RIE |
| Airline Dispatchers | 267 | ESI |
| Airline Flight Attendants | 41 | ESR |
| Airplane Pilots, Commercial | 29 | RIE |
| Airport Managers | 457 | ESR |
| Airport Security Workers | 271 | CRS |
| Airport Tower Controllers (air traffic) | 322 | SER |
| Air Traffic Controllers | 322 | no code |
| Aligners, Barrel and Receiver (firearms industry) | 399 | RIE |
| All-around Machinists | 32 | RIE |
| Allergists | 353 | ISE |
| Alumni Directors | 669 | ESA |
| Analysts | 626 | AES, ERS |
| Analysts, Computer Systems | 337 | IER |
| Analysts, Credit (loan officers) | 443 | CRS |
| Analysts, Data Communications (telecommunications workers) | 690 | RSI |
| Analysts, Handwriting | 618 | ACS |
| Analysts, Job | 272 | IES |
| Analysts, Management | 136 | ICR |
| Analysts, News (radio & televison news reporters) | 466 | ESI |
| Analysts, Operations Research | 514 | IRE |
| Analysts, Research (marketing researchers) | 254 | SER |
| Analysts, Stress (aerospace engineers) | 159 | RIE |
| Analytical Chemists | 153 | IRE |
| Anatomic Pathologists | 230 | IRE |
| Anchors, News (radio & television news reporters) | 466 | ESI |
| Anesthesiologist Assistants | 502 | ISA |
| Anesthesiologists | 452 | IRS |
| Anesthetists, Nurse | 662 | ISE |
| Animal Attendants | 319 | RCS |
| Animal Behavior Counselors | 508 | RES, SEC |
| Animal Behaviorists | 237 | IRE |
| Animal Behaviorists | 547 | IRE |
| Animal Behaviorists, Applied | 547 | IRE |
| Animal Behaviorists (scientists) | 238 | IAR |
| Animal Breeders | 644 | RES |
| Animal Caretakers | 319 | RCS |
| Animal Control Officers (caretakers) | 319 | SRE |
| Animal Ecologists | 237 | IRE |
| Animal Eviscerators (slaughtering & meat-packing production) | 423 | RES |
| Animal Nutritionists | 238 | IRS |
| Animal Physiologists (zoologists) | 237 | IRE |
| Animal Presenters (circus performers) | 251 | RES |
| Animal Scientists | 238 | IRS |
| Animal Shelter Attendants | 319 | RCS |
| Animal Stickers (slaughtering & meat-packing production) | 423 | REC |
| Animal Trainers | 508 | RES, SEC |
| Animal Trainers, Companion | 508 | RES, SEC |
| Animal Trainers, Domestic | 508 | RES, SEC |
| Animal Trainers, Marine | 508 | RES, SEC |
| Animal Trainers, Wild | 508 | RES, SEC |
| Animators | 8 | AES |
| Animators (cartoonists) | 124 | AES |
| Animators (video game developers) | 678 | AER |
| Annealers (bench jewelers) | 640 | CRE |
| Announcers | 54 | SCE |
| Announcers (radio & television broadcasting) | 428 | SCE |
| Answering Service Operators (receptionists) | 107 | CSE |
| Anthropologists | 382 | IRE |
| Anthropologists, Biological | 382 | IRE |
| Anthropologists, Biophysical | 382 | IRE |
| Anthropologists, Cultural | 382 | IRE |
| Anthropologists, Forensic | 382 | IRE |
| Anthropologists, Linguistic | 382 | IRE |
| Anthropologists, Physical | 382 | IRE |
| Anthropologists, Sociocultural | 382 | IRE |
| Antiques Dealers | 617 | ESC |
| Apiculturists (entomologists) | 243 | IRE |
| Apparel Industry Workers | 35 | no code |
| Appliance Service Technicians | 336 | RIE |
| Applications Adjudicators | 105 | no code |
| Applications Engineers | 614 | IES |
| Applications Programmers | 177 | IRC |
| Applied Animal Behaviorists | 547 | IRE |
| Applied Mathematicians | 162 | IER |
| Applied Statisticians | 165 | IRE |
| Appraisers, Auto Damage (insurance claim adjusters) | 300 | ERS |
| Appraisers, Personal Property | 391 | RIS |
| Appraisers, Real Estate | 257 | SCE |
| Apprenticeship Consultants (training & development specialists) | 572 | EIS, SRE |
| Aquaculture Farmers (fish farm) | 190 | ESA |
| Aquaculturists | 543 | IRE |
| Aquaculturists (fish farm workers) | 190 | IRE |
| Aquaculturists (zoologists) | 237 | IRE |
| Aquatic Biologists | 543 | IRE |
| Aquatic Biologists (fish farm workers) | 190 | IRE |
| Aquatic Botanists | 635 | IRE |
| Aquatic Ecologists (zoologists) | 237 | IRE |
| Arbitrators | 609 | SEA |
| Arborists | 291 | REI |
| Arborists, Commercial | 291 | REI |
| Arborists, Municipal | 291 | REI |
| Arborists, Utility | 291 | RSE |
| Archaeologists | 343 | IRE |
| Archaeologists (anthropologists) | 382 | IRE |
| Archaeologists, Classical | 343 | IRE |
| Archaeologists, Historical | 343 | IRE |
| Archaeologists, Industrial | 343 | IRE |
| Archaeologists, New World | 343 | IRE |
| Archaeologists, Old World | 343 | IRE |
| Archaeologists, Prehistoric | 343 | IRE |
| Architects | 51 | AIR |
| Architects, Landscape | 164 | AIR |
| Architects, Marine (marine engineers) | 163 | IRE |
| Architects, Naval | 585 | IRE |
| Architectural Drafters | 22 | RCI |
| Archivists | 610 | AES |
| Arc Welders | 27 | RIS |
| Armed Forces Personnel | 439 | no code |
| Armoured-Car Guards (security officers) | 170 | SER |
| Art and Design Workers (publishing) | 231 | AER, ARS, CIR, CRA |
| Art Directors (advertising agency) | 113 | AES |
| Art Directors (motion picture) | 262 | AES |
| Art Directors (publishing) | 231 | AES |
| Art Directors (video game developers) | 678 | AER |
| Artificial Insemination Technicians | 511 | REI |
| Artificial Intelligence Programmers | 678 | IRC |
| Artificial Intelligence Specialists | 516 | IRE |
| Artists, Fine | 653 | no code |
| Artists, Graphics (video game developers) | 678 | AER |
| Artists, Layout (advertising agency) | 113 | AER |
| Artists, Makeup (stage production technical staff) | 675 | AER |
| Artists, Nail | 602 | ESC |
| Artists (pottery & porcelain ware industry) | 137 | RIE |
| Artists, Stained Glass | 641 | ASE |
| Artists, Trapeze (circus performers) | 251 | REA |
| Arts Administrators | 535 | ESC, ESR |
| Arts and Cultural Planners | 535 | ESC, ESR |
| Art Teachers | 46 | ASE, SAE |
| Art Therapists | 1 | SAE |
| Asbestos Abatement Workers (hazardous materials removal) | 566 | RES |
| Assemblers (apparel industry) | 35 | CSR |
| Assemblers (dry cleaning) | 34 | CRS |
| Assemblers (electrical and electronics industry) | 318 | RES |
| Assemblers and Fabricators (motor vehicle & parts manufacturing) | 376 | RCE, REC |
| Assemblers (firearms industry) | 399 | RSE |
| Assemblers (pleasure craft boatbuilders) | 661 | REI |
| Assemblers (sporting goods production) | 567 | CRE |
| Assemblers (temporary workers) | 674 | RCE |
| Assembly Inspectors (firearms industry) | 399 | RCE |
| Assembly Machine Operators (pen & pencil industry) | 557 | RCE |
| Assessors | 465 | IES |
| Asset Managers | 122 | ESR |
| Assistant Account Executives (advertising agency) | 113 | AES |
| Assistant Court Clerks | 304 | CSE |
| Assistant Dispatchers (airline) | 267 | ESI |
| Assistant Engineers (recording industry) | 317 | RCS |
| Assistant Fire Chiefs (fire fighters) | 69 | EIS |
| Assistant Gaffers (motion picture industry) | 2 | REI |
| Assistant Lodging Managers | 350 | ESR |
| Assistant Managers (fast-food) | 340 | SER |
| Assistant Principals | 247 | SEA |
| Assistant Professors (college & university faculty members) | 184 | SEI |
| Assistant Restaurant Managers | 100 | ESR |
| Assistant Retail Buyers | 95 | ESR |
| Associate and Assistant Editors (publishing) | 231 | AES, CIA |
| Associate Directors (association executives) | 549 | ESR |
| Associate Professors (college & university faculty members) | 184 | SEI |
| Association Executives | 549 | ESA |
| Astronautical Engineers | 159 | IRS |
| Astronauts | 192 | IRS |
| Astronomers | 210 | IRE |
| Astronomers, Radio | 210 | IRE |
| Astronomers, Solar | 210 | IRE |
| Astrophysicists (astronomers) | 210 | IRE |
| Asylum Officers | 105 | no code |
| Athletes, Professional | 651 | SRC |
| Athletics Directors | 627 | SER |
| Athletic Trainers | 524 | SRE |
| Atmospheric Chemists | 143 | IRS |
| Atmospheric Scientists | 148 | IRS |
| Atmospheric Scientists | 143 | IRS |
| Attorneys | 94 | ESI |
| Attorneys, District (lawyers) | 94 | EIA |
| Auction Assistants (auctioneers) | 102 | CES |
| Auction Cashiers (auctioneers) | 102 | no code |
| Auction Clerks (auctioneers) | 102 | CES |
| Auctioneers | 102 | EAS |
| Audio Engineers (recording industry) | 317 | RES |
| Audiologists | 595 | ISR |
| Audio Maintenance Engineers (recording industry) | 317 | RES |
| Audio Programmers/Engineers | 678 | IRC |
| Auditing Clerks (bookkeepers) | 26 | CRE |
| Auditors | 101 | EIS |
| Auditors, Energy | 575 | RES |
| Auditors, External | 101 | EIS |
| Auditors, Government | 101 | ECI |
| Auditors, Information Systems | 101 | CIS |
| Auditors, Internal | 101 | ICR |
| Auditors, Internal (accountants) | 63 | ICR |
| Auditors, Tax | 101 | CES |
| Auditors, Unemployment Insurance | 101 | no code |
| Auto Damage Appraisers (insurance claim adjusters) | 300 | ERS |
| Automatic Oven Operators (bakery products) | 410 | RCE |
| Automatic Print Developers (photofinishing laboratory technicians) | 310 | RCS |
| Automobile Detailers (carwash attendants) | 589 | RCE |
| Automobile Mechanics | 45 | RCI |
| Automobile Salespersons | 133 | ESR |
| Automobile Technicians | 45 | RCI |
| Automotive Accessories Installers | 446 | RES |
| Automotive Body Customizers (accessories installers) | 446 | RES |
| Automotive Body Repairers | 96 | RIE |
| Automotive Painters (accessories installers) | 446 | RCE |
| Automotive Painters (body repairers) | 96 | RCE |
| Automotive Parts Salespersons | 307 | ESC |
| Automotive Technicians | 45 | RCI |
| Aviation Maintenance Technicians | 182 | RIE |
| Aviation Technicians | 182 | RIE |
| Avionics Technicians | 182 | RIE |