Links To: SA-SN, SN-SY
| SIC | C | Description | Quantity | DBG |
| Y | SAAB | 286 | 343 | |
| 738120 | SABOTAGE PREVENTION SERVICE | 1 | 1 | |
| 284407 | SACHETS (MANUFACTURERS) | 5 | 6 | |
| 594120 | SADDLERY & HARNESS | 2880 | 3456 | |
| 319901 | SADDLERY & HARNESS-MANUFACTURERS | 95 | 114 | |
| 519124 | SADDLERY & HARNESS-WHOLESALE | 8 | 10 | |
| 609908 | SAFE DEPOSIT BOX-RENTAL | 676 | 811 | |
| 504651 | SAFE DEPOSIT BOX-SALES (WHOLESALE) | 3 | 4 | |
| U | SAFECO | 1 | 1 | |
| U | SAFECO | 3 | 4 | |
| U | SAFECO | 3 | 4 | |
| U | SAFECO | 6 | 7 | |
| U | SAFECO | 2362 | 2834 | |
| 504418 | SAFES & VAULTS (WHOLESALE) | 3560 | 4272 | |
| 599903 | SAFES & VAULTS-DEALERS | 750 | 900 | |
| 349905 | SAFES & VAULTS-MANUFACTURERS | 216 | 259 | |
| 421207 | SAFES & VAULTS-MOVERS | 135 | 162 | |
| 769922 | SAFES & VAULTS-OPENING & REPAIRING | 2039 | 2447 | |
| 504419 | SAFES & VAULTS-USED (WHOLESALE) | 57 | 68 | |
| 341103 | SAFETY CANS (MANUFACTURERS) | 21 | 25 | |
| 874208 | SAFETY CONSULTANTS | 2305 | 2766 | |
| 508203 | SAFETY EQUIPMENT & CLOTHING (WHOL) | 4278 | 5134 | |
| 384207 | SAFETY EQUIPMENT & CLOTHING-MFRS | 130 | 156 | |
| 829947 | SAFETY TRAINING | 17 | 20 | |
| V | SAFEWAY | 864 | 1037 | |
| V | SAFEWAY STORE | 358 | 430 | |
| 221114 | SAIL FABRICS (MANUFACTURERS) | 1 | 1 | |
| 509160 | SAILBOATS & SAILBOAT SUPPLIES (WHOL) | 12 | 14 | |
| 799961 | SAILING INSTRUCTION | 100 | 120 | |
| 239401 | SAILMAKERS | 426 | 511 | |
| 209912 | SAIMIN (MANUFACTURERS) | 12 | 14 | |
| 514923 | SALADS (WHOLESALE) | 108 | 130 | |
| 209913 | SALADS-MANUFACTURERS | 18 | 22 | |
| 276102 | SALES & ORDER BOOKS (MANUFACTURERS) | 47 | 56 | |
| 874808 | SALES COUNSELORS | 46 | 55 | |
| 861103 | SALES ORGANIZATIONS | 437 | 524 | |
| L | SALES PRESENTATIONS | 77 | 92 | |
| 874810 | SALES PROMOTION SERVICE | 2295 | 2754 | |
| 874811 | SALES TRAINING | 849 | 1019 | |
| 549906 | SALT | 1352 | 1622 | |
| 147903 | SALT MINERS | 5 | 6 | |
| 147904 | SALT PROCESSING | 4 | 5 | |
| 2068 | SALTED & ROASTED NUTS & SEEDS | 250 | 300 | |
| 514954 | SALT-WHOLESALE | 5 | 6 | |
| 449902 | SALVAGE-MARINE | 263 | 316 | |
| 509320 | SALVAGE-YARDS (WHOLESALE) | 136 | 163 | |
| 731909 | SAMPLE CARDS & BOOKS | 127 | 152 | |
| 511224 | SAMPLE CARDS & BOOKS-WHOLESALE | 1 | 1 | |
| 316101 | SAMPLE CASES (MANUFACTURERS) | 47 | 56 | |
| 509930 | SAMPLE CASES-WHOLESALE & MFRS | 1 | 1 | |
| 951207 | SANCTUARIES-WILD LIFE | 40 | ||
| 503211 | SAND & GRAVEL (WHOLESALE) | 12416 | 14899 | |
| 508226 | SAND & GRAVEL HANDLING EQUIPMENT (WHOL) | 58 | 70 | |
| 144203 | SAND & GRAVEL-MFRS | 31 | 37 | |
| 179911 | SANDBLASTING | 4682 | 5618 | |
| 508202 | SANDBLASTING EQUIP & SUPPLIES (WHOL) | 911 | 1093 | |
| 353106 | SANDBLASTING EQUIPMENT & SUPPLIES-MFRS | 79 | 95 | |
| 735913 | SANDBLASTING EQUIPMENT-RENTING | 33 | 40 | |
| 735974 | SANDING MACHINES-RENTAL | 4 | 5 | |
| 329106 | SANDPAPER (MANUFACTURERS) | 2 | 2 | |
| 581219 | SANDWICHES | 8487 | 10184 | |
| 209914 | SANDWICHES-MANUFACTURERS | 20 | 24 | |
| 514925 | SANDWICHES-WHOLESALE | 147 | 176 | |
| 806302 | SANITARIUMS | 167 | 200 | |
| 265698 | SANITARY FOOD CNTNRS-EX FOLDING (MFRS) | 124 | 149 | |
| 2656 | SANITARY FOOD CONTAINERS EXCEPT FOLDING | 189 | 227 | |
| 358102 | SANITARY NAPKIN MACHINES (MANUFACTURERS) | 1 | 1 | |
| 512218 | SANITARY NAPKINS-WHOLESALE | 22 | 26 | |
| 2676 | SANITARY PAPER PRODUCTS | 209 | 251 | |
| 267602 | SANITARY PAPER PRODUCTS (MANUFACTURERS) | 165 | 198 | |
| 511326 | SANITARY PRODUCTS SUPPLIES & SVC (WHOL) | 13 | 16 | |
| 4959 | SANITARY SERVICES NEC | 1982 | 2378 | |
| 495999 | SANITARY SERVICES NEC | 47 | 56 | |
| 495308 | SANITATION CONSULTANTS | 124 | 149 | |
| 495307 | SANITATION SERVICES | 477 | 572 | |
| 332105 | SASH BALANCES & WEIGHTS (MANUFACTURERS) | 3 | 4 | |
| 179306 | SASH OPERATING DEVICES | 7 | 8 | |
| 243108 | SASH-WOOD-MANUFACTURERS | 10 | 12 | |
| 484103 | SATELLITE COMMS SERVICES-COMMON CARRIER | 454 | 545 | |
| 484107 | SATELLITE DESCRAMBLING/PROGRAMMING SVC | 17 | 20 | |
| 367909 | SATELLITE DISH-MANUFACTURERS | 5 | 6 | |
| 506543 | SATELLITE DISH-WHOLESALE | 3 | 4 | |
| 737506 | SATELLITE DOWNLINKING | 26 | 31 | |
| 762213 | SATELLITE EQUIP & SYSTEMS-SVC & REPAIR | 184 | 221 | |
| 366305 | SATELLITE EQUIPMENT & SYSTEMS-MFRS | 78 | 94 | |
| 573107 | SATELLITE EQUIPMENT & SYSTEMS-RETAIL | 8544 | 10253 | |
| 506546 | SATELLITE EQUIPMENT & SYSTEMS-WHOLESALE | 55 | 66 | |
| S | SATURN | 385 | 462 | |
| 203304 | SAUCES (MANUFACTURERS) | 47 | 56 | |
| 209915 | SAUERKRAUT (MANUFACTURERS) | 7 | 8 | |
| 594119 | SAUNA EQUIPMENT & SUPPLIES | 546 | 655 | |
| 363401 | SAUNA EQUIPMENT & SUPPLIES-MANUFACTURERS | 1 | 1 | |
| 507431 | SAUNA EQUIPMENT & SUPPLIES-WHOLESALE | 2 | 2 | |
| 2013 | SAUSAGE & OTHER PREPARED MEAT PRODUCTS | 1553 | 1864 | |
| 201301 | SAUSAGE CASINGS (MANUFACTURERS) | 64 | 77 | |
| 201103 | SAUSAGE MAKERS | 29 | 35 | |
| 542108 | SAUSAGES | 791 | 949 | |
| 201398 | SAUSAGES/OTHER PREPARED MEAT PROD (MFRS) | 1397 | 1676 | |
| 514705 | SAUSAGES-WHOLESALE | 86 | 103 | |
| 7 | SAVIN | 437 | 524 | |
| 603504 | SAVINGS & LOAN ASSNS-REPRESENTATIVES | 48 | 58 | |
| 603501 | SAVINGS & LOAN ASSOCIATIONS | 12927 | 15512 | |
| 603698 | SAVINGS INSTITUTIONS-EXCEPT FEDERAL | 1088 | 1306 | |
| 6035 | SAVINGS INSTITUTIONS-FEDERAL CHARTERED | 13290 | 15948 | |
| 6036 | SAVINGS INSTITUTIONS-NOT FEDERAL | 1088 | 1306 | |
| 603503 | SAVINGS PLANS | 259 | 311 | |
| Y | SAV-ON DRUGS | 370 | 444 | |
| 3425 | SAW BLADES & HANDSAWS | 305 | 366 | |
| 509917 | SAWDUST & SHAVINGS (WHOLESALE) | 335 | 402 | |
| 242106 | SAWMILL CONSULTANTS | 2 | 2 | |
| 508538 | SAWMILL EQUIPMENT & SUPPLIES (WHOLESALE) | 219 | 263 | |
| 355306 | SAWMILL EQUIPMENT & SUPPLIES-MFRS | 26 | 31 | |
| 242102 | SAWMILLS | 2245 | 2694 | |
| 2421 | SAWMILLS & PLANING MILLS-GENERAL | 6408 | 7690 | |
| 242198 | SAWMILLS & PLANING MILLS-GENERAL | 2525 | 3030 | |
| 525101 | SAWS | 11055 | 13266 | |
| N | SAWS INDUSTRIAL | 41 | 49 | |
| 355303 | SAWS-MANUFACTURERS | 33 | 40 | |
| 735912 | SAWS-RENTING | 100 | 120 | |
| 769924 | SAWS-SHARPENING & REPAIRING | 3204 | 3845 | |
| 242105 | SAWS-TIMBER | 1 | 1 | |
| 735915 | SCAFFOLDING-RENTING | 2116 | 2539 | |
| 359698 | SCALES & BALANCES-EX LABORATORY (MFRS) | 180 | 216 | |
| 3596 | SCALES & BALANCES-EXCEPT LABORATORY | 475 | 570 | |
| 504607 | SCALES (WHOLESALE) | 2265 | 2718 | |
| 359601 | SCALES-MANUFACTURERS | 295 | 354 | |
| 478502 | SCALES-PUBLIC | 280 | 336 | |
| 735914 | SCALES-RENTING | 114 | 137 | |
| 769923 | SCALES-REPAIRING | 674 | 809 | |
| 504627 | SCALES-USED (WHOLESALE) | 19 | 23 | |
| 239505 | SCALLOP CUTTING | 16 | 19 | |
| 729942 | SCALP TREATMENT | 872 | 1046 | |
| 504511 | SCANNING EQUIPMENT (WHOLESALE) | 51 | 61 | |
| 737405 | SCANNING SERVICE | 339 | 407 | |
| 565103 | SCARVES-WEARING APPAREL | 351 | 421 | |
| 792203 | SCENERY STUDIOS | 159 | 191 | |
| 2397 | SCHIFFLI MACHINE EMBROIDERIES | 108 | 130 | |
| 239798 | SCHIFFLI MACHINE EMBROIDERIES (MFRS) | 108 | 130 | |
| 673202 | SCHOLARSHIP PROGRAMS | 329 | 395 | |
| 821113 | SCHOOL BOARDS | 4 | 5 | |
| 4151 | SCHOOL BUSES | 302 | 362 | |
| 821198 | SCHOOL DISTRICTS-PUBLIC | 22 | 26 | |
| 502105 | SCHOOL FURNITURE & EQUIPMENT (WHOL) | 370 | 444 | |
| 502131 | SCHOOL FURNITURE & EQUIPMENT-RETAIL | 12 | 14 | |
| 829903 | SCHOOL INFORMATION | 436 | 523 | |
| 594309 | SCHOOL INSTRUCTIONAL MATERIALS | 5 | 6 | |
| 804935 | SCHOOL PSYCHOLOGISTS | 6 | 7 | |
| 511213 | SCHOOL SUPPLIES (WHOLESALE) | 2080 | 2496 | |
| 399931 | SCHOOL SUPPLIES-MANUFACTURERS | 234 | 281 | |
| 594311 | SCHOOL SUPPLIES-RETAIL | 526 | 631 | |
| 821103 | SCHOOLS | 145429 | 174515 | |
| 8299 | SCHOOLS & EDUCATIONAL SERVICES NEC | 31877 | 38252 | |
| 829999 | SCHOOLS & EDUCATIONAL SERVICES NEC | 98 | 118 | |
| 821102 | SCHOOLS FOR BLIND | 14 | 17 | |
| 821111 | SCHOOLS FOR THE DEAF | 23 | 28 | |
| 821107 | SCHOOLS WITH SPECIAL ACADEMIC EDUCATION | 3671 | 4405 | |
| 829944 | SCHOOLS WITH SPECIAL VOCATIONAL EDUC | 38 | 46 | |
| 824404 | SCHOOLS-ACCOUNTING | 42 | 50 | |
| 829945 | SCHOOLS-ACROBATIC | 3 | 4 | |
| 821108 | SCHOOLS-ADULT EDUCATION | 216 | 259 | |
| 824402 | SCHOOLS-BUSINESS & SECRETARIAL | 2733 | 3280 | |
| 824401 | SCHOOLS-BUSINESS & VOCATIONAL | 4830 | 5796 | |
| 822107 | SCHOOLS-CHIROPRACTIC | 7 | 8 | |
| 829940 | SCHOOLS-COLLEGE BOARD PREPARATION | 37 | 44 | |
| 829924 | SCHOOLS-COOKING | 227 | 272 | |
| 824910 | SCHOOLS-ELECTRONICS | 39 | 47 | |
| 829946 | SCHOOLS-FASHION | 14 | 17 | |
| 829901 | SCHOOLS-GENERAL INTEREST | 639 | 767 | |
| 824903 | SCHOOLS-INDUSTRIAL TECHNICAL & TRADE | 3234 | 3881 | |
| 824405 | SCHOOLS-LEGAL SECRETARIAL | 2 | 2 | |
| 824406 | SCHOOLS-MANAGEMENT DEVELOPMENT | 22 | 26 | |
| 822108 | SCHOOLS-MEDICAL | 204 | 245 | |
| 824906 | SCHOOLS-MEDICAL & DENTAL-ASSISTANTS/TECH | 461 | 553 | |
| 824407 | SCHOOLS-MEDICAL SECRETARIAL | 7 | 8 | |
| 821106 | SCHOOLS-MENTALLY RETARDED | 127 | 152 | |
| 835102 | SCHOOLS-NURSERY & KINDERGARTEN ACADEMIC | 41605 | 49926 | |
| 821109 | SCHOOLS-PREPARATORY | 18 | 22 | |
| 821110 | SCHOOLS-SPEECH DEFECT CORRECTION | 10 | 12 | |
| 829935 | SCHOOLS-TRAVEL AGENTS | 85 | 102 | |
| 822101 | SCHOOLS-UNIVERSITIES & COLLEGES ACADEMIC | 12882 | 15458 | |
| 1 | SCHWINN | 1445 | 1734 | |
| 804939 | SCIENCE OF MIND PRACTITIONERS | 1 | 1 | |
| 323112 | SCIENTIFIC APPARATUS & INSTRUMENTS-MFRS | 37 | 44 | |
| 504905 | SCIENTIFIC APPARATUS & INSTRUMENTS-WHOL | 1165 | 1398 | |
| I | SCIENTIFIC APPARATUS/INSTRUMENTS RPRNG | 35 | 42 | |
| 384102 | SCIENTIFIC INSTRUMENT DESIGNERS | 3 | 4 | |
| 899904 | SCIENTISTS-CONSULTING | 309 | 371 | |
| 866126 | SCIENTOLOGISTS | 9 | 11 | |
| 504618 | SCOREBOARDS (WHOLESALE) | 86 | 103 | |
| 9 | SCOTTISH INN | 133 | 160 | |
| 569945 | SCOUT SUPPLIES | 27 | 32 | |
| 5093 | SCRAP & WASTE MATERIALS | 18391 | 22069 | |
| 334104 | SCRAP FILM (MANUFACTURERS) | 13 | 16 | |
| 509313 | SCRAP METALS & IRON (WHOLESALE) | 5626 | 6751 | |
| 509314 | SCRAP METALS-PROCESSING/RECYCLING (WHOL) | 683 | 820 | |
| 353117 | SCRAP PROCESSING EQUIPMENT (MFRS) | 2 | 2 | |
| 509319 | SCRAP RUBBER (WHOLESALE) | 64 | 77 | |
| 503141 | SCREEN DOOR & WINDOW-WHOLESALE | 3 | 4 | |
| 152111 | SCREEN ENCLOSURES | 813 | 976 | |
| 275902 | SCREEN PRINTING | 16746 | 20095 | |
| 508449 | SCREEN PRINTING EQUIPMENT & SUPLS (WHOL) | 516 | 619 | |
| 275921 | SCREEN PRINTING-LABEL REMOVAL | 2 | 2 | |
| 356901 | SCREENING & SIFTING EQUIPMENT (MFRS) | 118 | 142 | |
| 571909 | SCREENS-DECORATIVE | 40 | 48 | |
| 521116 | SCREENS-DOOR & WINDOW | 3381 | 4057 | |
| 344206 | SCREENS-DOOR & WINDOW-MANUFACTURERS | 41 | 49 | |
| 344210 | SCREENS-MANUFACTURERS | 35 | 42 | |
| 503910 | SCREENS-MANUFACTURERS' EQUIP/SUPL (WHOL) | 70 | 84 | |
| 769926 | SCREENS-REPAIRING | 292 | 350 | |
| 505136 | SCREENS-WHOLESALE | 18 | 22 | |
| 3451 | SCREW MACHINE PRODUCTS | 2832 | 3398 | |
| 345101 | SCREW MACHINE PRODUCTS (MANUFACTURERS) | 2832 | 3398 | |
| 354106 | SCREW MACHINES & EQUIPMENT (MFRS) | 117 | 140 | |
| 507212 | SCREWS (WHOLESALE) | 771 | 925 | |
| 345204 | SCREWS-MANUFACTURERS | 183 | 220 | |
| 525118 | SCREWS-RETAIL | 2 | 2 | |
| 594419 | SCRIMSHAW | 6 | 7 | |
| 899932 | SCRIPT PREPARATION SERVICE | 5 | 6 | |
| 799987 | SCUBA DIVING TOURS | 102 | 122 | |
| 899907 | SCULPTORS | 911 | 1093 | |
| 599996 | SCULPTORS' EQUIPMENT & SUPPLIES | 32 | 38 | |
| 899934 | SCULPTORS-ARCHITECTURAL | 8 | 10 | |
| 899933 | SCULPTURES-METAL | 14 | 17 | |
| 162917 | SEA WALL CONTRACTORS | 92 | 110 | |
| 209201 | SEAFOOD PACKERS | 50 | 60 | |
| 542101 | SEAFOOD-RETAIL | 7225 | 8670 | |
| 514601 | SEAFOOD-WHOLESALE | 4434 | 5321 | |
| 516923 | SEALERS-ASPHALT, CONCRETE, ETC (WHOL) | 106 | 127 | |
| 508574 | SEALS-HERMETIC-DISTRIBUTORS | 23 | 28 | |
| 367910 | SEALS-HERMETIC-MANUFACTURERS | 22 | 26 | |
| 508571 | SEALS-MECHANICAL (WHOLESALE) | 111 | 133 | |
| 305303 | SEALS-METAL (MANUFACTURERS) | 63 | 76 | |
| 511212 | SEALS-NOTARY & CORP (WHOLESALE) | 388 | 466 | |
| 305301 | SEALS-OIL, GREASE, ETC (MANUFACTURERS) | 136 | 163 | |
| 508506 | SEALS-OIL, GREASE, ETC-WHOLESALE | 15 | 18 | |
| 507211 | SEALS-O-RING (WHOLESALE) | 500 | 600 | |
| 305305 | SEALS-O-RING-MANUFACTURERS | 15 | 18 | |
| 275215 | SEALS-SECURITY (MANUFACTURERS) | 26 | 31 | |
| 3812 | SEARCH DETECTION SYSTEMS & INSTRUMENTS | 1437 | 1724 | |
| 381298 | SEARCH DETECTION/NAV SYSTS/INSTR (MFRS) | 490 | 588 | |
| 738925 | SEARCHERS OF RECORDS | 262 | 314 | |
| 506354 | SEARCHLIGHTS (WHOLESALE) | 166 | 199 | |
| 4 | SEARS ROEBUCK & CO | 921 | 1105 | |
| 553126 | SEAT BELTS | 24 | 29 | |
| 239908 | SEAT BELTS-MANUFACTURERS | 16 | 19 | |
| 501352 | SEAT BELTS-WHOLESALE | 1 | 1 | |
| 502119 | SEATING COMPANIES (WHOLESALE) | 140 | 168 | |
| 593226 | SECOND HAND STORES | 3863 | 4636 | |
| 334198 | SECONDARY SMELTING & REFINING-NONFERROUS | 674 | 809 | |
| 3341 | SECONDARY SMELTING/REFINING-NONFERROUS | 805 | 966 | |
| 7338 | SECRETARIAL & COURT REPORTING SERVICES | 24130 | 28956 | |
| 733805 | SECRETARIAL SERVICES | 9522 | 11426 | |
| 621110 | SECURITIES | 51 | 61 | |
| 62 | SECURITY & COMMODITY BROKERS | 73521 | 88225 | |
| 6231 | SECURITY & COMMODITY EXCHANGES | 701 | 841 | |
| 6211 | SECURITY BROKERS & DEALERS | 34850 | 41820 | |
| 366902 | SECURITY CONTROL EQUIP & SYSTEMS-MFRS | 735 | 882 | |
| 506304 | SECURITY CONTROL EQUIP & SYSTEMS-WHOL | 8837 | 10604 | |
| 738102 | SECURITY GUARD & PATROL SERVICE | 7359 | 8831 | |
| 824916 | SECURITY GUARD SCHOOLS | 16 | 19 | |
| 874813 | SECURITY SYSTEMS CONSULTANTS | 2719 | 3263 | |
| 7382 | SECURITY SYSTEMS SERVICES | 1360 | 1632 | |
| 738204 | SECURITY SYSTS-COMMUNICATIONS/COMPUTER | 139 | 167 | |
| 072301 | SEED & GRAIN CLEANING | 579 | 695 | |
| 508322 | SEED CLEANING EQUIPMENT (WHOLESALE) | 25 | 30 | |
| 078212 | SEEDING & FERTILIZING CONTRACTORS | 404 | 485 | |
| 526129 | SEEDS & BULBS-RETAIL | 2883 | 3460 | |
| 519105 | SEEDS & BULBS-WHOLESALE | 1219 | 1463 | |
| 018102 | SEEDS-CERTIFIED | 2 | 2 | |
| 549924 | SEEDS-CHINESE PRESERVED | 37 | 44 | |
| 206803 | SEEDS-COATING (MANUFACTURERS) | 7 | 8 | |
| 206801 | SEEDS-EDIBLE-MANUFACTURERS | 235 | 282 | |
| 515305 | SEEDS-WAREHOUSE | 6 | 7 | |
| 138206 | SEISMIC DATA BROKERS | 38 | 46 | |
| 382918 | SEISMOGRAPH EQUIPMENT & SUPPLIES (MFRS) | 15 | 18 | |
| 138201 | SEISMOGRAPH SERVICE | 131 | 157 | |
| 509951 | SELF DEFENSE WEAPONS (WHOLESALE) | 17 | 20 | |
| 832271 | SELF HELP GROUPS | 12 | 14 | |
| 832246 | SELF IMPRVMNT/MOTIVATION-TRAINING MTRLS | 3 | 4 | |
| 832231 | SELF-ESTEEM PROGRAMS | 13 | 16 | |
| 367401 | SEMICONDUCTOR DEVICES (MANUFACTURERS) | 1376 | 1651 | |
| 506539 | SEMICONDUCTOR DEVICES-WHOLESALE | 48 | 58 | |
| 506349 | SEMICONDUCTOR-MFRS' EQUIP/SUPLS (WHOL) | 524 | 629 | |
| 3674 | SEMICONDUCTORS & RELATED DEVICES | 2385 | 2862 | |
| 367498 | SEMICONDUCTORS & RELATED DEVICES (MFRS) | 1006 | 1207 | |
| 832250 | SENIOR CITIZENS COUNSELING | 61 | 73 | |
| 836114 | SENIOR CITIZENS HOUSING | 145 | 174 | |
| 832206 | SENIOR CITIZENS SERVICE | 4143 | 4972 | |
| 836101 | SENIOR CITIZENS SERVICE ORGANIZATIONS | 7233 | 8680 | |
| 832226 | SENIOR CITIZENS SVC ORGS-DISC MERCHANTS | 26 | 31 | |
| S | SENIOR HIGH | 24994 | 29993 | |
| 738212 | SENSORS | 20 | 24 | |
| W | SENTRY | 684 | 821 | |
| W | SENTRY/DAIRYLAND | 1 | 1 | |
| W | SENTRY/DAIRYLAND | 1 | 1 | |
| W | SENTRY/DAIRYLAND | 9 | 11 | |
| 355606 | SEPARATORS (MANUFACTURERS) | 77 | 92 | |
| 171108 | SEPTIC TANKS | 12503 | 15004 | |
| 503915 | SEPTIC TANKS & SYSTEMS-WHOLESALE | 712 | 854 | |
| 171134 | SEPTIC TANKS CONSULTANTS | 231 | 277 | |
| 171107 | SEPTIC TANKS/SYSTEMS-CLEANING/REPAIRING | 8529 | 10235 | |
| 327206 | SEPTIC TANKS-MANUFACTURERS | 323 | 388 | |
| 999958 | SEPTIC TANKS-TREATMENT SUPPLIES | 105 | ||
| 399957 | SEQUINS (MANUFACTURERS) | 8 | 10 | |
| 283604 | SERUMS & VACCINES (MANUFACTURERS) | 20 | 24 | |
| 899977 | SERVICE BUREAUS | 2054 | 2465 | |
| 5087 | SERVICE ESTABLISHMENT EQUIPMENT | 42364 | 50837 | |
| 3589 | SERVICE INDUSTRY MACHINERY NEC | 2943 | 3532 | |
| 358998 | SERVICE INDUSTRY MACHINERY NEC (MFRS) | 1309 | 1571 | |
| 154216 | SERVICE STATION BUILDERS | 94 | 113 | |
| 517202 | SERVICE STATION EQUIPMENT (WHOLESALE) | 2015 | 2418 | |
| 179913 | SERVICE STATION EQUIPMENT-INSTALLING | 129 | 155 | |
| 358602 | SERVICE STATION EQUIPMENT-MANUFACTURERS | 5 | 6 | |
| 179915 | SERVICE STATION EQUIPMENT-SERVICING | 213 | 256 | |
| 517204 | SERVICE STATION SUPPLIES (WHOLESALE) | 128 | 154 | |
| 554101 | SERVICE STATIONS-GASOLINE & OIL | 82023 | 98428 | |
| 7819 | SERVICES ALLIED TO MOTION PICTURE | 5922 | 7106 | |
| 7829 | SERVICES ALLIED TO MOTION PICTURE DISTR | 105 | 126 | |
| 781998 | SERVICES ALLIED TO MOTION PICTURES | 35 | 42 | |
| 628999 | SERVICES ALLIED WITH EXCH OF SEC NEC | 99 | 119 | |
| 6289 | SERVICES ALLIED-EXCHANGE OF SECURITIES | 227 | 272 | |
| 899999 | SERVICES NEC | 690 | 828 | |
| 362109 | SERVOMECHANISM SYSTEMS & EQUIP (MFRS) | 4 | 5 | |
| 616205 | SETTLEMENT COMPANIES | 3 | 4 | |
| 832272 | SETTLEMENT HOUSES | 4 | 5 | |
| 2652 | SETUP PAPERBOARD BOXES | 1151 | 1381 | |
| 495201 | SEWAGE DISPOSAL SYSTEMS | 969 | 1163 | |
| 399972 | SEWAGE DISPOSAL SYSTEMS-MANUFACTURERS | 4 | 5 | |
| 509336 | SEWAGE DISPOSAL SYSTEMS-WHOLESALE | 2 | 2 | |
| 495204 | SEWAGE TREATMENT CONSULTANTS | 16 | 19 | |
| 495202 | SEWAGE TREATMENT EQUIPMENT | 422 | 506 | |
| 358908 | SEWAGE TREATMENT EQUIPMENT-MANUFACTURERS | 16 | 19 | |
| 503218 | SEWER & DRAIN PIPE (WHOLESALE) | 308 | 370 | |
| 508405 | SEWER CLEANING EQUIPMENT & SUPLS (WHOL) | 414 | 497 | |
| 358916 | SEWER CLEANING EQUIPMENT & SUPPLIES-MFRS | 6 | 7 | |
| 495203 | SEWER COMPANIES-UTILITY | 77 | 92 | |
| 162307 | SEWER CONTRACTORS | 9346 | 11215 | |
| 171152 | SEWER LINE CLEANING | 3 | 4 | |
| 999957 | SEWER SYSTEM INSPECTION/REHABILITATION | 62 | ||
| 162320 | SEWER TAPPERS | 2 | 2 | |
| 171153 | SEWER THAWING | 2 | 2 | |
| 4952 | SEWERAGE SYSTEMS | 1458 | 1750 | |
| 572229 | SEWING CABINETS | 2 | 2 | |
| 239902 | SEWING CONTRACTORS | 5672 | 6806 | |
| 824905 | SEWING INSTRUCTION | 634 | 761 | |
| 317204 | SEWING KITS & CASES (MANUFACTURERS) | 6 | 7 | |
| 363906 | SEWING MACHINES PARTS & SUPPLIES-MFRS | 20 | 24 | |
| 506422 | SEWING MACHINES PARTS/SUPLS-WHOLESALE | 73 | 88 | |
| 572218 | SEWING MACHINES-HOUSEHOLD | 4046 | 4855 | |
| 508448 | SEWING MACHINES-INDUSTRIAL/COML (WHOL) | 1034 | 1241 | |
| 363907 | SEWING MACHINES-MANUFACTURERS | 8 | 10 | |
| 735992 | SEWING MACHINES-RENTING | 3 | 4 | |
| 769925 | SEWING MACHINES-REPAIRING | 3513 | 4216 | |
| 572217 | SEWING MACHINES-SUPPLIES & ATTACHMENTS | 360 | 432 | |
| 5949 | SEWING NEEDLEWORK & PIECE GOODS | 15520 | 18624 | |
| 721919 | SEWING SHOPS-CUSTOM | 9 | 11 | |
| 832232 | SEXUAL COUNSELING & THERAPY | 56 | 67 | |
| 349622 | SHACKLES (MANUFACTURERS) | 2 | 2 | |
| 356802 | SHAFTING (MANUFACTURERS) | 19 | 23 | |
| R | SHAKEY'S PIZZA | 103 | 124 | |
| 0 | SHARP | 1750 | 2100 | |
| S | SHARP | 83 | 100 | |
| 149904 | SHARPENING EQUIPMENT & STONES | 30 | 36 | |
| 769928 | SHARPENING SERVICE | 2695 | 3234 | |
| L | SHAVED ICE | 34 | 41 | |
| 506415 | SHAVERS-ELECTRIC (WHOLESALE) | 239 | 287 | |
| 762924 | SHAVERS-ELECTRIC-REPAIRING | 523 | 628 | |
| 571903 | SHEARS & SCISSORS | 103 | 124 | |
| 342101 | SHEARS-MANUFACTURERS | 11 | 13 | |
| 342922 | SHEAVES (MANUFACTURERS) | 7 | 8 | |
| 154218 | SHEDS TOOL & UTILITY | 611 | 733 | |
| 0214 | SHEEP & GOATS | 8 | 10 | |
| 021498 | SHEEP & GOATS | 5 | 6 | |
| 075107 | SHEEP SHEARING | 3 | 4 | |
| 569910 | SHEEPSKIN SPECIALTIES | 229 | 275 | |
| 238602 | SHEEPSKIN SPECIALTIES-MANUFACTURERS | 1 | 1 | |
| 021403 | SHEEPSKINS | 1 | 1 | |
| 344403 | SHEET METAL FABRICATORS | 7190 | 8628 | |
| 3444 | SHEET METAL WORK | 7762 | 9314 | |
| 171103 | SHEET METAL WORK CONTRACTORS | 11009 | 13211 | |
| 171109 | SHEET METAL WORKERS | 397 | 476 | |
| 508509 | SHEET METAL WORKING EQUIP & SUPLS (WHOL) | 348 | 418 | |
| 505131 | SHEET METAL WORK-WHOLESALE | 28 | 34 | |
| 507225 | SHELF REACHERS (WHOLESALE) | 1 | 1 | |
| T | SHELL | 5324 | 6389 | |
| 285106 | SHELLAC-MANUFACTURERS | 4 | 5 | |
| 0913 | SHELLFISH | 161 | 193 | |
| 091398 | SHELLFISH | 8 | 10 | |
| 594722 | SHELLS-DECORATIVE | 24 | 29 | |
| 399950 | SHELLS-DECORATIVE-MANUFACTURERS | 3 | 4 | |
| 399905 | SHELLS-MARINE (MANUFACTURERS) | 242 | 290 | |
| 519983 | SHELLS-MARINE-WHOLESALE | 8 | 10 | |
| 1 | SHELTER INS | 1 | 1 | |
| 1 | SHELTER INS | 5 | 6 | |
| 1 | SHELTER INS | 13 | 16 | |
| 1 | SHELTER INS | 13 | 16 | |
| 1 | SHELTER INS | 9 | 11 | |
| 1 | SHELTER INS | 1277 | 1532 | |
| 836107 | SHELTERED CARE HOMES | 94 | 113 | |
| 833101 | SHELTERED WORKSHOPS | 196 | 235 | |
| 152137 | SHELTERS | 110 | 132 | |
| 836115 | SHELTERS FOR BATTERED WOMEN | 82 | 98 | |
| 504613 | SHELVING (WHOLESALE) | 1727 | 2072 | |
| 504606 | SHELVING-COMMERCIAL & INDUSTRIAL (WHOL) | 273 | 328 | |
| 571941 | SHELVING-HOUSEHOLD & DECORATIVE | 33 | 40 | |
| 254205 | SHELVING-MANUFACTURERS | 179 | 215 | |
| N | SHERATON | 232 | 278 | |
| 922103 | SHERIFF | 6738 | ||
| G | SHERWIN WILLIAMS | 2134 | 2561 | |
| 804956 | SHIATSU THERAPY | 7 | 8 | |
| 384501 | SHIELDING-MAGNETIC ELECTROSTATIC (MFRS) | 28 | 34 | |
| 349908 | SHIMS (MANUFACTURERS) | 29 | 35 | |
| 521115 | SHINGLES & SHAKES | 448 | 538 | |
| 242901 | SHINGLES & SHAKES-MANUFACTURERS | 49 | 59 | |
| 503327 | SHINGLES-WHOLESALE | 4 | 5 | |
| 508803 | SHIP BROKERS | 288 | 346 | |
| 373101 | SHIP BUILDERS & REPAIRERS | 790 | 948 | |
| 3731 | SHIP BUILDING & REPAIRING | 985 | 1182 | |
| 353121 | SHIP BUILDING EQUIP & SUPPLIES (MFRS) | 6 | 7 | |
| 373103 | SHIP CEILING (MANUFACTURERS) | 2 | 2 | |
| 508805 | SHIP CHANDLERS (WHOLESALE) | 301 | 361 | |
| 449105 | SHIP CLEANING | 46 | 55 | |
| 449312 | SHIP FUELING | 17 | 20 | |
| 175111 | SHIP JOINERS | 4 | 5 | |
| 449107 | SHIP MOORING LINE SERVICE | 4 | 5 | |
| 449911 | SHIP OWNERS & OPERATORS | 7 | 8 | |
| 449910 | SHIP REGISTERS | 8 | 10 | |
| 449912 | SHIP WRECKERS | 2 | 2 | |
| 373104 | SHIP YARDS | 15 | 18 | |
| 861110 | SHIPPERS COOPERATIVE ORGANIZATIONS | 10 | 12 | |
| 444902 | SHIPPING AGENTS | 781 | 937 | |
| 874812 | SHIPPING CONSULTANTS | 156 | 187 | |
| 421503 | SHIPPING MASTERS | 97 | 116 | |
| 511306 | SHIPPING ROOM SUPPLIES (WHOLESALE) | 599 | 719 | |
| 511333 | SHIPPING SERVICE SUPPLIES (WHOLESALE) | 17 | 20 | |
| 513626 | SHIRTINGS (WHOLESALE) | 11 | 13 | |
| 569912 | SHIRTS-CUSTOM MADE | 630 | 756 | |
| 232101 | SHIRTS-MANUFACTURERS | 543 | 652 | |
| 721918 | SHIRTS-REPAIRING | 7 | 8 | |
| 561110 | SHIRTS-RETAIL | 91 | 109 | |
| 513607 | SHIRTS-WHOLESALE | 199 | 239 | |
| 553120 | SHOCK ABSORBERS | 2747 | 3296 | |
| 371409 | SHOCK ABSORBERS-MANUFACTURERS | 14 | 17 | |
| 501372 | SHOCK ABSORBERS-WHOLESALE | 1 | 1 | |
| 725102 | SHOE & BOOT REPAIRING | 9547 | 11456 | |
| 239214 | SHOE BAGS (MANUFACTURERS) | 4 | 5 | |
| J | SHOE CITY | 141 | 169 | |
| 313107 | SHOE COUNTERS (MANUFACTURERS) | 2 | 2 | |
| 399932 | SHOE COVERS-MANUFACTURERS | 1 | 1 | |
| 725104 | SHOE DYERS | 353 | 424 | |
| 513910 | SHOE FABRICS (WHOLESALE) | 11 | 13 | |
| 313106 | SHOE FILLERS (MANUFACTURERS) | 1 | 1 | |
| 508452 | SHOE FINDINGS & SUPPLIES (WHOLESALE) | 179 | 215 | |
| 313109 | SHOE FINDINGS & SUPPLIES-MANUFACTURERS | 5 | 6 | |
| 566104 | SHOE LACES | 27 | 32 | |
| 249916 | SHOE LASTS (MANUFACTURERS) | 1 | 1 | |
| L | SHOE MACHINERY | 32 | 38 | |
| 355906 | SHOE MACHINERY-MANUFACTURERS | 4 | 5 | |
| 566108 | SHOE ORNAMENTS | 10 | 12 | |
| 399968 | SHOE PATTERNS (MANUFACTURERS) | 2 | 2 | |
| 7251 | SHOE REPAIR SHOPS & SHOESHINE PARLORS | 9927 | 11912 | |
| 508783 | SHOE REPAIRING EQUIPMENT & SUPLS (WHOL) | 6 | 7 | |
| 313110 | SHOE SHANKS (MANUFACTURERS) | 1 | 1 | |
| 725103 | SHOE SHINING | 338 | 406 | |
| 725105 | SHOE SHINING EQUIPMENT & SUPPLIES | 30 | 36 | |
| 566106 | SHOE STORE SUPPLIES | 12 | 14 | |
| 5661 | SHOE STORES | 33695 | 40434 | |
| 249917 | SHOE TREES (MANUFACTURERS) | 5 | 6 | |
| 738928 | SHOES-CUSTOM MADE | 372 | 446 | |
| 314402 | SHOES-MANUFACTURERS | 227 | 272 | |
| 313101 | SHOES-MANUFACTURERS SUPPLIES (MFRS) | 120 | 144 | |
| 508761 | SHOES-MANUFACTURERS SUPPLIES-WHOLESALE | 8 | 10 | |
| 314401 | SHOES-MANUFACTURERS-WOMENS | 147 | 176 | |
| 566102 | SHOES-ORTHOPEDIC | 1431 | 1717 | |
| 384208 | SHOES-ORTHOPEDIC-MANUFACTURERS | 4 | 5 | |
| 725106 | SHOES-ORTHOPEDIC-REPAIRING | 33 | 40 | |
| 566101 | SHOES-RETAIL | 30570 | 36684 | |
| 566109 | SHOES-SAFETY | 25 | 30 | |
| 593248 | SHOES-USED | 3 | 4 | |
| 513902 | SHOES-WHOLESALE | 1283 | 1540 | |
| 244103 | SHOOK-MANUFACTURERS | 4 | 5 | |
| 244105 | SHOOKS (MANUFACTURERS) | 4 | 5 | |
| S | SHOPKO | 130 | 156 | |
| 738112 | SHOPLIFTING PREVENTION DEVICES | 58 | 70 | |
| 731923 | SHOPPER'S INFORMATION SERVICE | 2 | 2 | |
| 274109 | SHOPPERS' NEWS PUBLICATIONS | 255 | 306 | |
| 504647 | SHOPPING CARTS & BASKETS-WHOLESALE | 4 | 5 | |
| 349602 | SHOPPING CARTS, BASKETS, & BAGS-MFRS | 109 | 131 | |
| 651207 | SHOPPING CENTER CONSULTANTS | 1 | 1 | |
| 651205 | SHOPPING CENTER DEVELOPERS | 27 | 32 | |
| 651201 | SHOPPING CENTERS & MALLS | 4806 | 5767 | |
| 729920 | SHOPPING SERVICE-BUSINESS | 22 | 26 | |
| 729941 | SHOPPING SERVICE-PERSONAL | 279 | 335 | |
| C | SHOPPING SVC-PROTECTIVE PRICE COMPARISON | 98 | 118 | |
| 179966 | SHORES-ADJUSTABLE | 2 | 2 | |
| 179916 | SHORING | 244 | 293 | |
| 207903 | SHORTENING (MANUFACTURERS) | 24 | 29 | |
| 2079 | SHORTENING OILS MARGARINE & FATS NEC | 221 | 265 | |
| 207998 | SHORTENING TBL OILS MARGARINE ETC (MFR) | 133 | 160 | |
| 6153 | SHORT-TERM BUSINESS CREDIT INSTITUTIONS | 2191 | 2629 | |
| 339802 | SHOT PEENING (MANUFACTURERS) | 70 | 84 | |
| 239601 | SHOULDER PADS (MANUFACTURERS) | 38 | 46 | |
| 239610 | SHOULDER STRAPS (MANUFACTURERS) | 3 | 4 | |
| 353122 | SHOVELS-POWER (MANUFACTURERS) | 1 | 1 | |
| 731912 | SHOW CARDS | 9 | 11 | |
| 504608 | SHOW CASES (WHOLESALE) | 213 | 256 | |
| 502321 | SHOWER CURTAINS (WHOLESALE) | 30 | 36 | |
| 521117 | SHOWER DOORS & ENCLOSURES | 3363 | 4036 | |
| 308801 | SHOWER DOORS & ENCLOSURES-MANUFACTURERS | 23 | 28 | |
| 503928 | SHOWER DOORS & ENCLOSURES-WHOLESALE | 8 | 10 | |
| 729971 | SHOWERS-PORTABLE | 2 | 2 | |
| 504648 | SHOWROOM EQUIP & SUPPLIES (WHOLESALE) | 10 | 12 | |
| 352312 | SHREDDERS-MANUFACTURERS | 38 | 46 | |
| 091302 | SHRIMP-AQUACULTURE | 3 | 4 | |
| 209204 | SHRIMP-PACKERS | 22 | 26 | |
| 542109 | SHRIMP-RETAIL | 124 | 149 | |
| 514603 | SHRIMP-WHOLESALE | 39 | 47 | |
| J | SHRINERS (TANGIER TEMPLE) | 158 | 190 | |
| J | SHRINERS (TANGIER TEMPLE) | 83 | 100 | |
| 594118 | SHUFFLEBOARDS | 28 | 34 | |
| 521119 | SHUTTERS | 2410 | 2892 | |
| 344207 | SHUTTERS-MANUFACTURERS | 111 | 133 | |
| 503142 | SHUTTERS-WHOLESALE | 92 | 110 | |
| 411103 | SHUTTLE SERVICE | 56 | 67 | |
| 177108 | SIDEWALK CONTRACTORS | 91 | 109 | |
| 364502 | SIDEWALK-DOORS & LIGHTS (MANUFACTURERS) | 1 | 1 | |
| 176118 | SIDEWALL SHINGLING CONTRACTORS | 1 | 1 | |
| 176111 | SIDING CONTRACTORS | 17493 | 20992 | |
| 521118 | SIDING MATERIALS | 1868 | 2242 | |
| 344411 | SIDING MATERIALS-MANUFACTURERS | 88 | 106 | |
| 503308 | SIDING MATERIALS-WHOLESALE | 369 | 443 | |
| 799963 | SIGHTSEEING TOURS | 1865 | 2238 | |
| 179960 | SIGN CONTRACTORS | 109 | 131 | |
| 738905 | SIGN PAINTERS | 904 | 1085 | |
| 506306 | SIGNAL SYSTEMS (WHOLESALE) | 57 | 68 | |
| 366904 | SIGNALS-MANUFACTURERS | 29 | 35 | |
| 3993 | SIGNS & ADVERTISING SPECIALTIES | 31271 | 37525 | |
| 399398 | SIGNS & ADVERTISING SPECIALTIES (MFRS) | 3461 | 4153 | |
| 399302 | SIGNS (MANUFACTURERS) | 27466 | 32959 | |
| 506305 | SIGNS-EQUIPMENT & SUPPLIES (WHOLESALE) | 730 | 876 | |
| 738937 | SIGNS-ERECTORS & HANGERS | 744 | 893 | |
| 504642 | SIGNS-MACHINES & SUPPLIES (WHOLESALE) | 9 | 11 | |
| 738938 | SIGNS-MAINTENANCE & REPAIRING | 2381 | 2857 | |
| 399307 | SIGNS-NEON (MANUFACTURERS) | 145 | 174 | |
| 731202 | SIGNS-RENTING | 48 | 58 | |
| 509933 | SIGNS-WHOLESALE | 74 | 89 | |
| 516211 | SILAGE COVERINGS (WHOLESALE) | 2 | 2 | |
| 999959 | SILENCERS-INDUSTRIAL | 45 | ||
| 144601 | SILICA | 35 | 42 | |
| 281913 | SILICA GEL (MANUFACTURERS) | 3 | 4 | |
| 333906 | SILICON (MANUFACTURERS) | 10 | 12 | |
| 508588 | SILICONE PRODUCTS (WHOLESALE) | 17 | 20 | |
| 516935 | SILICONES (WHOLESALE) | 145 | 174 | |
| 733609 | SILK SCREEN PRINTING | 52 | 62 | |
| 224113 | SILK WARPERS (MANUFACTURERS) | 2 | 2 | |
| 222102 | SILKS-MANUFACTURERS | 28 | 34 | |
| 513104 | SILKS-WHOLESALE | 123 | 148 | |
| 154204 | SILOS | 169 | 203 | |
| 508336 | SILOS-EQUIPMENT & SUPPLIES (WHOLESALE) | 7 | 8 | |
| 1044 | SILVER ORES | 47 | 56 | |
| 104498 | SILVER ORES | 47 | 56 | |
| 3914 | SILVER PLATED & STAINLESS STEEL WARE | 1046 | 1255 | |
| 334102 | SILVER RECOVERY | 25 | 30 | |
| F | SILVER REED | 54 | 65 | |
| 594401 | SILVERWARE | 422 | 506 | |
| 769927 | SILVERWARE CLEANING/REPAIRING/REPLATING | 150 | 180 | |
| 251105 | SILVERWARE CONTAINERS (MANUFACTURERS) | 1 | 1 | |
| 391404 | SILVERWARE-MANUFACTURERS | 6 | 7 | |
| 391498 | SILVERWARE-PLTD/STAINLESS STL WARE (MFR) | 397 | 476 | |
| 735917 | SILVERWARE-RENTAL | 12 | 14 | |
| 593243 | SILVERWARE-USED | 19 | 23 | |
| 509431 | SILVERWARE-WHOLESALE | 9 | 11 | |
| S | SIMPLICITY | 866 | 1039 | |
| 899942 | SIMULATORS | 7 | 8 | |
| 381213 | SIMULATORS & TRAINING DEVICES-MFRS | 8 | 10 | |
| 9 | SINCLAIR | 423 | 508 | |
| 792902 | SINGING TELEGRAMS | 616 | 739 | |
| 864104 | SINGLES ORGANIZATIONS | 105 | 126 | |
| 507432 | SINKS & SINK TOPS-WHOLESALE | 17 | 20 | |
| 8 | SIR SPEEDY | 663 | 796 | |
| 506353 | SIRENS & HORNS (WHOLESALE) | 26 | 31 | |
| 525112 | SISAL | 4 | 5 | |
| 179410 | SITE DEVELOPMENT CONTRACTORS | 23 | 28 | |
| 874207 | SITE PLANNERS | 52 | 62 | |
| 835103 | SITTING SERVICES | 1102 | 1322 | |
| S | SIZZLER | 299 | 359 | |
| 769930 | SKATE SHARPENING | 244 | 293 | |
| 799994 | SKATEBOARD PARKS & RINKS | 36 | 43 | |
| 594116 | SKATEBOARDS & EQUIPMENT | 1040 | 1248 | |
| 394933 | SKATEBOARDS & EQUIPMENT-MANUFACTURERS | 2 | 2 | |
| 509157 | SKATEBOARDS & EQUIPMENT-WHOLESALE | 4 | 5 | |
| 569957 | SKATING APPAREL | 8 | 10 | |
| 594117 | SKATING EQUIPMENT & SUPPLIES | 1924 | 2309 | |
| 394919 | SKATING EQUIPMENT & SUPPLIES-MFRS | 7 | 8 | |
| 509139 | SKATING EQUIPMENT & SUPPLIES-WHOLESALE | 12 | 14 | |
| 799962 | SKATING INSTRUCTION | 247 | 296 | |
| 799901 | SKATING RINKS | 2667 | 3200 | |
| 594155 | SKATING RINKS-EQUIPMENT & SUPPLIES | 1 | 1 | |
| 179961 | SKATING RINKS-INSTALLATION, EQUIP/SUPLS | 14 | 17 | |
| 899924 | SKI & SNOW REPORTS | 41 | 49 | |
| 569914 | SKI APPAREL | 62 | 74 | |
| 509158 | SKI LIFT & SKI TOW EQUIP & SUPLS (WHOL) | 26 | 31 | |
| 701110 | SKIING CENTERS & RESORTS | 961 | 1153 | |
| 394920 | SKIING EQUIPMENT-MANUFACTURERS | 46 | 55 | |
| 799964 | SKIING EQUIPMENT-RENTAL | 1349 | 1619 | |
| 769946 | SKIING EQUIPMENT-REPAIRING | 158 | 190 | |
| 594115 | SKIING EQUIPMENT-RETAIL | 2238 | 2686 | |
| 509109 | SKIING EQUIPMENT-WHOLESALE | 115 | 138 | |
| 799966 | SKIING INSTRUCTION | 194 | 233 | |
| 799710 | SKIING ORGANIZATIONS | 42 | 50 | |
| 472502 | SKIING TOURS | 191 | 229 | |
| 7 | SKIL | 369 | 443 | |
| 8051 | SKILLED NURSING CARE FACILITIES | 21136 | 25363 | |
| 805198 | SKILLED NURSING CARE FACILITIES | 50 | 60 | |
| 6 | SKILSAW | 23 | 28 | |
| 394918 | SKIN & SCUBA DIVING EQUIPMENT-MFRS | 8 | 10 | |
| 509138 | SKIN & SCUBA DIVING EQUIPMENT-WHOLESALE | 12 | 14 | |
| 594114 | SKIN DIVING EQUIPMENT | 14 | 17 | |
| 723101 | SKIN TREATMENTS | 10535 | 12642 | |
| 732302 | SKIP TRACING | 67 | 80 | |
| 799952 | SKYDIVING & PARACHUTE JUMPING INSTRCTNS | 288 | 346 | |
| 176110 | SKYLIGHTS | 1458 | 1750 | |
| 344412 | SKYLIGHTS-MANUFACTURERS | 31 | 37 | |
| 503143 | SKYLIGHTS-WHOLESALE | 1 | 1 | |
| 179409 | SLABJACKING CONTRACTORS | 4 | 5 | |
| 329501 | SLAG (MANUFACTURERS) | 159 | 191 | |
| 503217 | SLATE (WHOLESALE) | 260 | 312 | |
| 394414 | SLEDS (MANUFACTURERS) | 5 | 6 | |
| 801115 | SLEEP TEACHING | 4 | 5 | |
| 239909 | SLEEPING BAGS-MANUFACTURERS | 5 | 6 | |
| 509140 | SLEEPING BAGS-WHOLESALE | 1 | 1 | |
| 508487 | SLICING MACHINES (WHOLESALE) | 172 | 206 | |
| 511237 | SLIDE RULES (WHOLESALE) | 3 | 4 | |
| 504913 | SLIDE RULES-WHOLESALE | 6 | 7 | |
| 738408 | SLIDES & FILM STRIPS | 792 | 950 | |
| 504308 | SLIDES & FILM STRIPS-WHOLESALE | 4 | 5 | |
| 733610 | SLIDES COMPUTER GRAPHICS ETC | 128 | 154 | |
| 349603 | SLINGS (MANUFACTURERS) | 351 | 421 | |
| 571409 | SLIP COVERS | 970 | 1164 | |
| 239205 | SLIP COVERS-MANUFACTURERS | 19 | 23 | |
| 502341 | SLIP COVERS-WHOLESALE | 21 | 25 | |
| 566105 | SLIPPERS | 18 | 22 | |
| 314201 | SLIPPERS-MANUFACTURERS | 46 | 55 | |
| 513909 | SLIPPERS-WHOLESALE | 27 | 32 | |
| 354903 | SLITTING MACHINES (MANUFACTURERS) | 4 | 5 | |
| 799996 | SLOT CAR RACE COURSES | 25 | 30 | |
| 799310 | SLOT MACHINES-SALES & SERVICE | 12 | 14 | |
| 999962 | SLOTTED ANGLE MATERIALS | 3 | ||
| 507825 | SLUSH MACHINES (WHOLESALE) | 5 | 6 | |
| 3484 | SMALL ARMS | 183 | 220 | |
| 3482 | SMALL ARMS AMMUNITION | 141 | 169 | |
| 348403 | SMALL ARMS-MANUFACTURERS | 110 | 132 | |
| 508234 | SMELTERS & REFINERS EQUIP/SUPLS (WHOL) | 4 | 5 | |
| 333902 | SMELTERS & REFINERS-BASE METALS | 98 | 118 | |
| 333901 | SMELTERS & REFINERS-PRECIOUS METALS | 131 | 157 | |
| M | SMITH-CORONA | 590 | 708 | |
| U | SMITH'S FOOD & DRUG CTR | 109 | 131 | |
| 233904 | SMOCKS-MANUFACTURERS | 6 | 7 | |
| 753928 | SMOKE ABATEMENT EQUIPMENT | 19 | 23 | |
| 734209 | SMOKE ODOR COUNTERACTING | 688 | 826 | |
| 344302 | SMOKE STACKS (MANUFACTURERS) | 60 | 72 | |
| 179505 | SMOKE STACKS-DISMANTLING | 3 | 4 | |
| 542114 | SMOKED FOODS | 9 | 11 | |
| 839910 | SMOKERS INFORMATION & TREATMENT CENTERS | 977 | 1172 | |
| 542118 | SMOKING & CURING SERVICE | 11 | 13 | |
| 541102 | SNACK PRODUCTS | 484 | 581 | |
| 5 | SNAPPER | 4047 | 4856 | |
| 5 | SNAPPER | 3 | 4 | |
| E | SNAPPY CAR RENTAL | 218 | 262 | |
| 804947 | SNORING TREATMENT & DEVICES | 9 | 11 | |
| 799989 | SNORKELING | 86 | 103 | |
| 507826 | SNOW BALL MACHINES (WHOLESALE) | 8 | 10 | |
| 358518 | SNOW BALL MACHINES EQUIP/SUPPLIES (MFRS) | 4 | 5 | |
| 358514 | SNOW MAKING MACHINES (MANUFACTURERS) | 12 | 14 | |
| 171150 | SNOW MELTING SYSTEMS | 14 | 17 | |
| 526132 | SNOW REMOVAL EQUIPMENT-RETAIL | 3795 | 4554 | |
| 508327 | SNOW REMOVAL EQUIPMENT-WHOLESALE | 5 | 6 | |
| 734910 | SNOW REMOVAL SERVICE | 8114 | 9737 | |
| 594147 | SNOWBOARDS-RETAIL | 1063 | 1276 | |
| 799722 | SNOWMOBILE CLUBS | 2 | 2 | |
| 559902 | SNOWMOBILE PARTS & ACCESSORIES-RETAIL | 144 | 173 | |
| 501353 | SNOWMOBILE PARTS & ACCESSORIES-WHOLESALE | 5 | 6 | |
| 379904 | SNOWMOBILE-EQUIPMENT/SUPPLIES-MFRS | 12 | 14 | |
| 379902 | SNOWMOBILE-MANUFACTURERS | 9 | 11 | |
| 799953 | SNOWMOBILE-RENTING & LEASING | 268 | 322 | |
| 769929 | SNOWMOBILE-REPAIRING & MAINTENANCE | 324 | 389 | |
| 559904 | SNOWMOBILES | 2800 | 3360 |