Links to: AB-AG AG-AL, AL-AN, AP-AS, AS-AX
| SIC | c | DESCRIPTION | QUANTITY | DBG |
| 512202 | ABDOMINAL SUPPORTS (WHOLESALE) | 57 | 68 | |
| 384202 | ABDOMINAL SUPPORTS-MANUFACTURERS | 7 | 8 | |
| 839903 | ABORTION ALTERNATIVES ORGANIZATIONS | 2701 | 3241 | |
| 809304 | ABORTION INFORMATION SERVICES | 972 | 1166 | |
| 3291 | ABRASIVE PRODUCTS | 766 | 919 | |
| 508523 | ABRASIVES (WHOLESALE) | 1417 | 1700 | |
| 329102 | ABRASIVES-MANUFACTURERS | 538 | 646 | |
| 516904 | ABSORBENTS (WHOLESALE) | 197 | 236 | |
| 384220 | ABSORBENTS-MANUFACTURERS | 8 | 10 | |
| 654103 | ABSTRACTERS | 3741 | 4489 | |
| 832251 | ABUSE INFORMATION & TREATMENT CENTERS | 29 | 35 | |
| 829937 | ACADEMIC CAREER COORDINATION | 9 | 11 | |
| 738210 | ACCESS PANELS | 94 | 113 | |
| 563215 | ACCESSORIES-FASHION | 37 | 44 | |
| 632198 | ACCIDENT & HEALTH INS (UNDERWRITERS) | 305 | 366 | |
| 6321 | ACCIDENT & HEALTH INSURANCE | 509 | 611 | |
| 874852 | ACCIDENT RECONSTRUCTION SERVICE | 323 | 388 | |
| 701117 | ACCOMMODATIONS | 4 | 5 | |
| 573606 | ACCORDIONS | 67 | 80 | |
| 872101 | ACCOUNTANTS | 83883 | 100660 | |
| 872107 | ACCOUNTANTS REFERRAL SERVICE | 56 | 67 | |
| 872110 | ACCOUNTANTS-CERTIFIED-MANAGEMENT | 16 | 19 | |
| 872102 | ACCOUNTING & BOOKKEEPING GENERAL SVC | 27722 | 33266 | |
| 504401 | ACCOUNTING & BOOKKEEPING SYSTEMS (WHOL) | 568 | 682 | |
| 8721 | ACCOUNTING AUDITING & BOOKKEEPING SVCS | 113214 | 135857 | |
| 504408 | ACCOUNTING/BOOKKEEPING MACH/SUPLS (WHOL) | 304 | 365 | |
| 344301 | ACCUMULATORS (MANUFACTURERS) | 24 | 29 | |
| 1 | ACE | 3776 | 4531 | |
| 516908 | ACETYLENE (WHOLESALE) | 31 | 37 | |
| R | ACID PROOF EQUIPMENT & MATERIALS | 23 | 28 | |
| 516910 | ACIDS (WHOLESALE) | 32 | 38 | |
| C | ACME MARKETS | 2 | 2 | |
| C | ACME MARKETS | 125 | 150 | |
| 734936 | ACOUSTICAL CLEANERS | 1 | 1 | |
| 871102 | ACOUSTICAL CONSULTANTS | 384 | 461 | |
| 174202 | ACOUSTICAL CONTRACTORS | 2356 | 2827 | |
| 174201 | ACOUSTICAL MATERIALS | 788 | 946 | |
| 329602 | ACOUSTICAL MATERIALS-MANUFACTURERS | 27 | 32 | |
| 503921 | ACOUSTICAL MATERIALS-WHOLESALE | 42 | 50 | |
| 282107 | ACRYLIC (MANUFACTURERS) | 13 | 16 | |
| 899910 | ACTUARIES | 1021 | 1225 | |
| 804913 | ACUPUNCTURE | 5480 | 6576 | |
| 824914 | ACUPUNCTURE SCHOOLS | 3 | 4 | |
| 7 | ACURA | 287 | 344 | |
| 504409 | ADDRESSING MACHINES & SUPPLIES (WHOL) | 174 | 209 | |
| 733106 | ADDRESSING PLATE SERVICE | 10 | 12 | |
| 516912 | ADHESIVES & GLUES (WHOLESALE) | 988 | 1186 | |
| 289101 | ADHESIVES & GLUES-MANUFACTURERS | 304 | 365 | |
| 357902 | ADHESIVES & GLUING EQUIPMENT-MFRS | 158 | 190 | |
| 2891 | ADHESIVES & SEALANTS | 1347 | 1616 | |
| 289198 | ADHESIVES & SEALANTS (MANUFACTURERS) | 1004 | 1205 | |
| 641101 | ADJUSTERS-PUBLIC | 359 | 431 | |
| 7322 | ADJUSTMENT & COLLECTION SERVICES | 7521 | 9025 | |
| 95 | ADMIN-ENVIRONMENTAL QUALITY PROGRAMS | 19770 | ||
| 96 | ADMINISTRATION OF ECONOMIC PROGRAMS | 27085 | ||
| 9411 | ADMINISTRATION OF EDUCATIONAL PROGRAMS | 2146 | ||
| 9611 | ADMINISTRATION OF GEN ECONOMIC PROGRAMS | 2541 | ||
| 9531 | ADMINISTRATION OF HOUSING PROGRAMS | 583 | ||
| 9532 | ADMINISTRATION OF URBAN PLANNING | 3543 | ||
| 9451 | ADMINISTRATION OF VETERANS AFFAIRS | 1037 | ||
| 94 | ADMINISTRATION-HUMAN RESOURCE PROGRAMS | 26378 | ||
| 9431 | ADMINISTRATION-PUBLIC HEALTH PROGRAMS | 8599 | ||
| B | ADMINISTRATIVE | 15343 | 18412 | |
| 9441 | ADMIN-SOCIAL & HUMAN RESOURCE PROGRAMS | 14971 | ||
| 325901 | ADOBE BLOCKS & SHAPES (MANUFACTURERS) | 8 | 10 | |
| 174105 | ADOBE MATERIALS & CONTRACTORS | 53 | 64 | |
| 832207 | ADOPTION AGENCIES | 2450 | 2940 | |
| A | ADULT | 516 | 619 | |
| 832273 | ADULT ABUSE HOTLINE | 2 | 2 | |
| 805903 | ADULT CARE FACILITIES | 926 | 1111 | |
| 836108 | ADULT CONGREGATE LIVING FACILITIES | 328 | 394 | |
| 792227 | ADULT ENTERTAINMENT | 191 | 229 | |
| 7311 | ADVERTISING AGENCIES | 31472 | 37766 | |
| 7319 | ADVERTISING NEC | 9432 | 11318 | |
| 731999 | ADVERTISING NEC | 357 | 428 | |
| 731903 | ADVERTISING-AERIAL | 275 | 330 | |
| 731101 | ADVERTISING-AGENCIES & COUNSELORS | 25104 | 30125 | |
| 733605 | ADVERTISING-ART LAYOUT & PRODUCTION SVC | 321 | 385 | |
| 731104 | ADVERTISING-CHECKING SERVICE | 40 | 48 | |
| 731917 | ADVERTISING-COMPUTER | 92 | 110 | |
| 731914 | ADVERTISING-COUPONS | 233 | 280 | |
| 733105 | ADVERTISING-DIRECT MAIL | 5569 | 6683 | |
| 731103 | ADVERTISING-DIRECTORY & GUIDE | 2100 | 2520 | |
| 731916 | ADVERTISING-DISTRIBUTORS | 28 | 34 | |
| 731911 | ADVERTISING-INDOOR | 231 | 277 | |
| 731918 | ADVERTISING-JEWELRY AWARDS & INCENTIVES | 2 | 2 | |
| 731306 | ADVERTISING-MAGAZINE | 225 | 270 | |
| 731105 | ADVERTISING-MOTION PICTURE | 146 | 175 | |
| 731106 | ADVERTISING-NEWSPAPER | 3455 | 4146 | |
| 731201 | ADVERTISING-OUTDOOR | 2549 | 3059 | |
| 731108 | ADVERTISING-PERIODICAL | 579 | 695 | |
| 731109 | ADVERTISING-PERSONNEL RECRUITMENT | 50 | 60 | |
| 731919 | ADVERTISING-PROMOTIONAL | 1120 | 1344 | |
| 731303 | ADVERTISING-RADIO | 2140 | 2568 | |
| 824915 | ADVERTISING-SCHOOLS | 1 | 1 | |
| 731915 | ADVERTISING-SEARCHLIGHTS | 10 | 12 | |
| 731107 | ADVERTISING-SHOPPERS' GUIDES | 380 | 456 | |
| 731307 | ADVERTISING-SOUNDTRACK & JINGLES | 26 | 31 | |
| 519917 | ADVERTISING-SPECIALTIES (WHOLESALE) | 14696 | 17635 | |
| 399303 | ADVERTISING-SPECIALTIES-MANUFACTURERS | 173 | 208 | |
| 731305 | ADVERTISING-TELEVISION | 2102 | 2522 | |
| 731110 | ADVERTISING-TIME & TEMP ANNOUNCEMENTS | 3 | 4 | |
| 731902 | ADVERTISING-TRANSIT & TRANSPORTATION | 150 | 180 | |
| 731920 | ADVERTISING-TRAVELING SIGNBOARDS | 1 | 1 | |
| 731308 | ADVERTISING-VIDEO PRODUCTION SERVICES | 8 | 10 | |
| 1 | AEG | 46 | 55 | |
| 078215 | AERATORS | 3 | 4 | |
| 072103 | AERIAL APPLICATORS | 1982 | 2378 | |
| 733509 | AERIAL PATROL & INSPECTION SERVICE | 23 | 28 | |
| 452203 | AERIAL PERSONNEL LIFTS | 8 | 10 | |
| 559916 | AERIAL TOWERS | 2 | 2 | |
| 799103 | AEROBIC INSTRUCTION | 48 | 58 | |
| 559912 | AERONAUTICAL SUPPLIES | 39 | 47 | |
| 399901 | AEROSOLS (MANUFACTURERS) | 117 | 140 | |
| 381201 | AEROSPACE INDUSTRIES | 744 | 893 | |
| 874402 | AEROSPACE SUPPORT SERVICES-TECHNICAL | 16 | 19 | |
| A | AETNA | 5 | 6 | |
| A | AETNA | 4 | 5 | |
| A | AETNA | 1 | 1 | |
| A | AETNA | 5 | 6 | |
| A | AETNA | 7 | 8 | |
| A | AETNA | 1883 | 2260 | |
| 599948 | AFRICAN GOODS-RETAIL | 250 | 300 | |
| B | AG (ASSOCIATED GROCER) | 6 | 7 | |
| B | AG (ASSOCIATED GROCER) | 63 | 76 | |
| 594415 | AGATES | 5 | 6 | |
| D | AGCO-ALLIS | 89 | 107 | |
| D | AGCO-ALLIS | 252 | 302 | |
| E | AGCO-ALLIS | 82 | 98 | |
| 0 | AGCO-ALLIS | 160 | 192 | |
| C | AGENCY RENT-A-CAR | 49 | 59 | |
| 519104 | AGRICULTURAL CHEMICALS (WHOLESALE) | 529 | 635 | |
| 874820 | AGRICULTURAL CONSULTANTS | 1213 | 1456 |