Links to: AB-AG AG-AL, AL-AN, AP-AS, AS-AX
| 873410 | ASSAYERS & ASSAYING SERVICE | 70 | 84 | |
| 504914 | ASSAYERS SUPPLIES (WHOLESALE) | 5 | 7 | |
| 399906 | ASSEMBLY & FABRICATING SERVICE | 2194 | 2633 | |
| 653140 | ASSESSMENT CONSULTANTS | 18 | 22 | |
| 874236 | ASSET PROTECTION CONSULTANTS | 35 | 42 | |
| B | ASSISTED LIVING | 1915 | 2298 | |
| A | ASSOCIATES DEGREE | 537 | 644 | |
| A | ASSOCIATES DEGREE | 2949 | 3539 | |
| 874105 | ASSOCIATION MANAGEMENT | 919 | 1103 | |
| 861102 | ASSOCIATIONS | 49323 | 59188 | |
| E | ASTRO | 13 | 16 | |
| 799905 | ASTROLOGERS | 778 | 934 | |
| 829949 | ASTROLOGY SCHOOLS | 10 | 12 | |
| B | AT & T | 76 | 91 | |
| A | ATARI | 21 | 25 | |
| A | ATHLETE'S FOOT | 300 | 360 | |
| 569946 | ATHLETIC CLOTHING-RETAIL | 56 | 67 | |
| 869905 | ATHLETIC ORGANIZATIONS | 2138 | 2566 | |
| A | ATLANTIC & PACIFIC TEA CO | 5 | 6 | |
| A | ATLANTIC & PACIFIC TEA CO | 197 | 236 | |
| C | ATLANTIC BUILDING SYSTEMS | 4 | 5 | |
| D | ATLANTIC RICHFIELD | 465 | 558 | |
| 2 | ATLAS | 370 | 444 | |
| A | ATLAS | 22 | 26 | |
| A | ATLAS COPCO | 159 | 191 | |
| 399969 | ATOMIZERS (MANUFACTURERS) | 3 | 4 | |
| 152124 | ATTIC & BASEMENT FINISHING | 29 | 35 | |
| 811102 | ATTORNEY REFERRAL SERVICE | 705 | 846 | |
| 811103 | ATTORNEYS | 239645 | 287574 | |
| 811101 | ATTORNEYS SERVICE BUREAUS | 3154 | 3785 | |
| 738901 | AUCTIONEERS | 10696 | 12835 | |
| I | AUDI | 186 | 223 | |
| 804912 | AUDIOLOGISTS | 3654 | 4385 | |
| 508818 | AUDIOMETERS (WHOLESALE) | 190 | 228 | |
| 809931 | AUDIOMETRIC TESTING | 53 | 64 | |
| 781908 | AUDIO-VISUAL CONSULTANTS | 564 | 677 | |
| 781201 | AUDIO-VISUAL CREATIVE SERVICES | 34 | 41 | |
| 504301 | AUDIO-VISUAL EQUIPMENT & SUPLS (WHOL) | 1009 | 1211 | |
| 573113 | AUDIO-VISUAL EQUIPMENT-DEALERS | 1392 | 1670 | |
| 735904 | AUDIO-VISUAL EQUIPMENT-RENTING & LEASING | 1694 | 2033 | |
| 762204 | AUDIO-VISUAL EQUIPMENT-REPAIRING | 495 | 594 | |
| 781203 | AUDIO-VISUAL PRODUCTION SERVICE | 3717 | 4460 | |
| 799904 | AUDITORIUMS | 28 | 34 | |
| 5531 | AUTO & HOME SUPPLY STORES | 130710 | 156852 | |
| 3822 | AUTO CONTROLS-REGULATING ENVIRONMENTS | 2316 | 2779 | |
| 7533 | AUTO EXHAUST SYSTEM REPAIR SHOPS | 17820 | 21384 | |
| 508773 | AUTO INSPECTION STA EQUIP/SUPLS (WHOL) | 142 | 170 | |
| 501339 | AUTO MACHINE SHOP EQUIP/SUPLS (WHOL) | 34 | 41 | |
| 5962 | AUTO MERCHANDISING MACHINE OPERATORS | 11922 | 14306 | |
| 75 | AUTO REPAIR SERVICES & PARKING | 418591 | 502309 | |
| 239901 | AUTO SEATCOVERS ETC-MATERIAL/EQPT-MFRS | 70 | 84 | |
| 753820 | AUTOCLAVES | 2 | 2 | |
| 599945 | AUTOGRAPH DEALERS | 193 | 232 | |
| 599976 | AUTOGRAPHIC REGISTERS & SUPPLIES | 66 | 79 | |
| 602103 | AUTOMATED TELLER MACHINES | 319 | 383 | |
| 382298 | AUTOMATIC CNTRLS-RESIDENTIAL/COML (MFRS) | 536 | 643 | |
| 3581 | AUTOMATIC VENDING MACHINES | 171 | 205 | |
| 874819 | AUTOMATION CONSULTANTS | 286 | 343 | |
| 356907 | AUTOMATION SYSTEMS & EQUIPMENT-MFRS | 1585 | 1902 | |
| 504430 | AUTOMATION SYSTEMS & EQUIPMENT-WHOLESALE | 59 | 71 | |
| 501208 | AUTOMOBILE & TRUCK BROKERS | 1911 | 2293 | |
| 553129 | AUTOMOBILE ACCESSORIES | 231 | 277 | |
| 553106 | AUTOMOBILE AIR CONDITIONING EQUIPMENT | 14271 | 17125 | |
| 553107 | AUTOMOBILE ALARMS | 4493 | 5392 | |
| 754919 | AUTOMOBILE APPEARANCE & PROTECTION | 2 | 2 | |
| 738916 | AUTOMOBILE APPRAISERS | 961 | 1153 | |
| 501204 | AUTOMOBILE AUCTIONS (WHOLESALE) | 672 | 806 | |
| 753219 | AUTOMOBILE BEDS | 3 | 4 | |
| 501309 | AUTOMOBILE BODY SHOP EQUIP/SUPLS (WHOL) | 4514 | 5417 | |
| 355904 | AUTOMOBILE BODY SHOP EQUIPMENT-MFRS | 621 | 745 | |
| 371103 | AUTOMOBILE BODY-MANUFACTURERS | 257 | 308 | |
| 753201 | AUTOMOBILE BODY-REPAIRING & PAINTING | 64669 | 77603 | |
| 553108 | AUTOMOBILE BUMPERS GUARDS & GRILLS | 704 | 845 | |
| 371416 | AUTOMOBILE BUMPERS GUARDS & GRILLS-MFRS | 19 | 23 | |
| 501365 | AUTOMOBILE BUMPERS GUARDS & GRILLS-WHOL | 1 | 1 | |
| 869912 | AUTOMOBILE CLUBS | 302 | 362 | |
| 753933 | AUTOMOBILE CLUTCH REBUILDING | 2 | 2 | |
| 553135 | AUTOMOBILE COVERS | 7 | 8 | |
| 501311 | AUTOMOBILE CRUISE CONTROL EQUIP (WHOL) | 65 | 78 | |
| 509324 | AUTOMOBILE CRUSHING SERVICE (WHOLESALE) | 24 | 29 | |
| 753203 | AUTOMOBILE CUSTOMIZING | 6842 | 8210 | |
| 551102 | AUTOMOBILE DEALERS-NEW CARS | 24380 | 29256 | |
| 551103 | AUTOMOBILE DEALERS-USED CARS | 81421 | 97705 | |
| 501205 | AUTOMOBILE DEALERS-USED CARS-WHOLESALE | 591 | 709 | |
| 754203 | AUTOMOBILE DETAIL & CLEAN-UP SERVICE | 13271 | 15925 | |
| 501331 | AUTOMOBILE DIAGNOSTIC EQUIPMENT (WHOL) | 76 | 91 | |
| 754907 | AUTOMOBILE DIAGNOSTIC SERVICE | 3795 | 4554 | |
| 382504 | AUTOMOBILE DIAGNOSTIC SERVICE EQUIP-MFRS | 8 | 10 | |
| 501508 | AUTOMOBILE DISMANTLING/RECYCLING (WHOL) | 65 | 78 | |
| 551101 | AUTOMOBILE DLRS-CUSTOM DESIGNED REPLICA | 111 | 133 | |
| 553110 | AUTOMOBILE ELECTRIC EQUIPMENT | 367 | 440 | |
| 369401 | AUTOMOBILE ELECTRIC EQUIPMENT-MFRS | 40 | 48 | |
| 501341 | AUTOMOBILE ELECTRIC EQUIPMENT-WHOLESALE | 4 | 5 | |
| 753911 | AUTOMOBILE ELECTRIC SERVICE | 7512 | 9014 | |
| 754918 | AUTOMOBILE EMISSION TESTING | 25 | 30 | |
| 553109 | AUTOMOBILE FLOOR COVERINGS | 133 | 160 | |
| 227302 | AUTOMOBILE FLOOR COVERINGS-MANUFACTURERS | 13 | 16 | |
| 753910 | AUTOMOBILE FRAME STRAIGHTENING | 256 | 307 | |
| 753929 | AUTOMOBILE FUEL CONVERSION | 1 | 1 | |
| 753602 | AUTOMOBILE GLASS-SERVICE & INSTALLATION | 656 | 787 | |
| 501318 | AUTOMOBILE HAND & FOOT CONTROLS (WHOL) | 170 | 204 | |
| 753912 | AUTOMOBILE HEADLIGHT ADJUSTING | 52 | 62 | |
| 553112 | AUTOMOBILE HUB CAPS | 501 | 601 | |
| 754908 | AUTOMOBILE INSPECTION STATIONS | 9332 | 11198 | |
| 769987 | AUTOMOBILE LOCK-OUT SVC | 47 | 56 | |
| 754903 | AUTOMOBILE LUBRICATION SERVICE | 9031 | 10837 | |
| 354503 | AUTOMOBILE MACHINE SHOP EQUIP/SUPLS-MFRS | 11 | 13 | |
| 753802 | AUTOMOBILE MACHINE SHOP SERVICE | 7745 | 9294 | |
| 501343 | AUTOMOBILE MACHINE SHOP SERVICE-WHOL | 7 | 8 | |
| 753804 | AUTOMOBILE MOTOR REBUILDING | 531 | 637 | |
| 501319 | AUTOMOBILE MOTORS (WHOLESALE) | 182 | 218 | |
| 753202 | AUTOMOBILE PAINT | 45 | 54 | |
| 7521 | AUTOMOBILE PARKING | 5532 | 6638 | |
| 501503 | AUTOMOBILE PARTS & SUPLS-ANTIQUE (WHOL) | 160 | 192 | |
| 371401 | AUTOMOBILE PARTS & SUPPLIES-MFRS | 7511 | 9013 | |
| 553111 | AUTOMOBILE PARTS & SUPPLIES-RETAIL-NEW | 52017 | 62420 | |
| 501313 | AUTOMOBILE PARTS & SUPPLIES-WHOLESALE | 10325 | 12390 | |
| 501501 | AUTOMOBILE PARTS-USED & REBUILT (WHOL) | 16895 | 20274 | |
| 501310 | AUTOMOBILE PARTS-WAREHOUSES | 423 | 508 | |
| 753213 | AUTOMOBILE PIN STRIPING | 61 | 73 | |
| 553113 | AUTOMOBILE RACING CAR EQUIPMENT | 5948 | 7138 | |
| 552103 | AUTOMOBILE RACING CARS | 952 | 1142 | |
| 501344 | AUTOMOBILE RACING EQUIPMENT-WHOLESALE | 3 | 4 | |
| 371402 | AUTOMOBILE RACING/SPORTS CAR EQUIP-MFRS | 68 | 82 | |
| 753901 | AUTOMOBILE RADIATOR REPAIRING | 8810 | 10572 | |
| 371403 | AUTOMOBILE RADIATOR-MANUFACTURERS | 177 | 212 | |
| 365104 | AUTOMOBILE RADIO & STEREO SYSTEMS-MFRS | 63 | 76 | |
| 501312 | AUTOMOBILE RADIO & STEREO SYSTEMS-WHOL | 245 | 294 | |
| 553114 | AUTOMOBILE RADIO & STEREO SYSTS-SLS/SVC | 7217 | 8660 | |
| 762203 | AUTOMOBILE RADIO/STEREO SYSTS-REPAIRING | 41 | 49 | |
| 553140 | AUTOMOBILE REMOTE STARTERS | 8 | 10 | |
| 751401 | AUTOMOBILE RENTING & LEASING | 21374 | 25649 | |
| 594207 | AUTOMOBILE REPAIR MANUALS | 1 | 1 | |
| 753926 | AUTOMOBILE REPAIR/SVC FACILITIES-RENTING | 48 | 58 | |
| 371404 | AUTOMOBILE REPAIR/SVC-EQUIP & SUPLS-MFRS | 120 | 144 | |
| 501314 | AUTOMOBILE REPAIR/SVC-EQUIP/SUPL (WHOL) | 1098 | 1318 | |
| 753801 | AUTOMOBILE REPAIRING & SERVICE | 188222 | 225866 | |
| 753819 | AUTOMOBILE REPAIRING & SERVICE-MOBILE | 59 | 71 | |
| 753204 | AUTOMOBILE RESTORATION-ANTIQUE & CLASSIC | 2152 | 2582 | |
| 753207 | AUTOMOBILE SEATCOVERS TOPS & UPHOLSTERY | 7703 | 9244 | |
| 239910 | AUTOMOBILE SEATCOVERS-MANUFACTURERS | 85 | 102 | |
| 501345 | AUTOMOBILE SEATCOVERS-WHOLESALE | 278 | 334 | |
| 753922 | AUTOMOBILE SHOCK ABSORBERS | 1 | 1 | |
| 753913 | AUTOMOBILE SMOG BRAKE/LAMP-INSPCTN & RPR | 2886 | 3463 | |
| 753902 | AUTOMOBILE SMOG CONTROL DEVICES | 131 | 157 | |
| 501363 | AUTOMOBILE SPEED CONTROLS (WHOLESALE) | 33 | 40 | |
| 573118 | AUTOMOBILE STEREO EQUIP & ACCESSORIES | 15 | 18 | |
| 422601 | AUTOMOBILE STORAGE | 349 | 419 | |
| 553101 | AUTOMOBILE SUNROOFS | 1850 | 2220 | |
| 753932 | AUTOMOBILE SUSPENSIONS | 32 | 38 | |
| 729954 | AUTOMOBILE TAG AGENCIES | 316 | 379 | |
| 754910 | AUTOMOBILE TRANSPORTERS & DRIVE-AWAY CO | 1117 | 1340 | |
| 754902 | AUTOMOBILE UNDERCOATING & RUSTPROOFING | 925 | 1110 | |
| 516944 | AUTOMOBILE UNDERCOATING MATERIALS (WHOL) | 7 | 8 | |
| 501337 | AUTOMOBILE UPHLSTRY/TOP MTRL/EQUIP-DISTR | 42 | 50 | |
| 754204 | AUTOMOBILE UPHOLSTERY CLEANING | 965 | 1158 | |
| 639902 | AUTOMOBILE WARRANTY PROCESSING SERVICE | 68 | 82 | |
| 371418 | AUTOMOBILE WHEEL-MANUFACTURERS | 16 | 19 | |
| 371302 | AUTOMOBILE WRECKERS-MANUFACTURERS | 2 | 2 | |
| 501502 | AUTOMOBILE WRECKING (WHOLESALE) | 4537 | 5444 | |
| 552102 | AUTOMOBILE-ANTIQUE & CLASSIC | 2271 | 2725 | |
| 751403 | AUTOMOBILE-ANTIQUE/CLASSIC-RENTING/LSNG | 1 | 1 | |
| 501206 | AUTOMOBILE-BUYERS | 1140 | 1368 | |
| 371102 | AUTOMOBILE-MANUFACTURERS | 232 | 278 | |
| 371417 | AUTOMOBILE-MANUFACTURERS EQUIP/SUPL-MFRS | 32 | 38 | |
| 501320 | AUTOMOBILE-MFRS EQUIP & SUPLS (WHOL) | 327 | 392 | |
| 753220 | AUTOMOBILE-NEW CAR PRE-DELIVERY SERVICE | 11 | 13 | |
| 517218 | AUTOMOBILE-OIL REFINERS-DISTRIBUTORS | 8 | 10 | |
| 291106 | AUTOMOBILE-OIL REFINERS-MANUFACTURERS | 2 | 2 | |
| 874854 | AUTOMOBILE-PURCHASING CONSULTANTS | 131 | 157 | |
| 753205 | AUTOMOBILE-RECONDITIONING | 110 | 132 | |
| 5012 | AUTOMOBILES & OTHER MOTOR VEHICLES | 8481 | 10177 | |
| 754909 | AUTOMOBILE-STRIPING SERVICE | 163 | 196 | |
| 753214 | AUTOMOBILE-WOOD REFINISHING | 2 | 2 | |
| 754921 | AUTOMOTIVE CONSULTANTS | 125 | 150 | |
| 55 | AUTOMOTIVE DEALERS & SERVICE STATIONS | 354510 | 425412 | |
| 5599 | AUTOMOTIVE DEALERS NEC | 10759 | 12911 | |
| 559999 | AUTOMOTIVE DEALERS NEC | 13 | 16 | |
| 594212 | AUTOMOTIVE FOREIGN MANUALS | 1 | 1 | |
| 7536 | AUTOMOTIVE GLASS REPLACEMENT SHOPS | 6120 | 7344 | |
| 753698 | AUTOMOTIVE GLASS REPLACEMENT SHOPS | 13 | 16 | |
| 754917 | AUTOMOTIVE INFORMATION SERVICES | 23 | 28 | |
| 753998 | AUTOMOTIVE REPAIR SHOPS | 27 | 32 | |
| 7539 | AUTOMOTIVE REPAIR SHOPS NEC | 64234 | 77081 | |
| 7549 | AUTOMOTIVE SERVICES-EXCEPT REPAIR | 60728 | 72874 | |
| 3465 | AUTOMOTIVE STAMPINGS | 459 | 551 | |
| 346598 | AUTOMOTIVE STAMPINGS (MANUFACTURERS) | 459 | 551 | |
| 754999 | AUTOMOTIVE SVCS-EXCEPT RPR & CAR WASHES | 28 | 34 | |
| 7537 | AUTOMOTIVE TRANSMISSION REPAIR SHOPS | 17986 | 21583 | |
| 239698 | AUTOMOTIVE TRIMMING/APPRL FINDINGS (MFR) | 1546 | 1855 | |
| 2396 | AUTOMOTIVE TRIMMINGS & APPAREL FINDINGS | 1757 | 2108 | |
| 027907 | AVIARIES | 1 | 1 | |
| 874822 | AVIATION CONSULTANTS | 827 | 992 | |
| 517223 | AVIATION FUEL (WHOLESALE) | 29 | 35 | |
| 869919 | AVIATION ORGANIZATIONS | 29 | 35 | |
| 1 | AVIS | 736 | 883 | |
| 599961 | AWNINGS & CANOPIES | 5776 | 6931 | |
| 734929 | AWNINGS & CANOPIES-CLEANING | 106 | 127 | |
| 179980 | AWNINGS & CANOPIES-MAINTENANCE | 88 | 106 | |
| 239402 | AWNINGS & CANOPIES-MANUFACTURERS | 197 | 236 | |
| 503922 | AWNINGS & CANOPIES-WHOLESALE | 23 | 28 | |
| 753915 | AXLES | 473 | 568 | |
| 371419 | AXLES-MANUFACTURERS | 35 | 42 |