| SIC | C | Description | Quantity | DBG |
| 1 | IBM | 38 | 46 | |
| 5 | IBM | 18 | 22 | |
| 5 | IBM | 2619 | 3143 | |
| I | IBM | 1085 | 1302 | |
| 599977 | ICE | 2478 | 2974 | |
| 358516 | ICE BOXES (MANUFACTURERS) | 5 | 6 | |
| 308918 | ICE CHESTS (MANUFACTURERS) | 8 | 10 | |
| 2024 | ICE CREAM & FROZEN DESSERTS | 1776 | 2131 | |
| 202498 | ICE CREAM & FROZEN DESSERTS (MFRS) | 1776 | 2131 | |
| 514304 | ICE CREAM & FROZEN DESSERTS-DISTRIBUTORS | 1970 | 2364 | |
| 507807 | ICE CREAM CABINETS (WHOLESALE) | 8 | 10 | |
| 514509 | ICE CREAM CONE-DISTRIBUTORS | 71 | 85 | |
| 205202 | ICE CREAM CONE-MANUFACTURERS | 39 | 47 | |
| 507824 | ICE CREAM CONE-MFRS' EQUIPMENT (WHOL) | 4 | 5 | |
| 507809 | ICE CREAM FREEZERS (WHOLESALE) | 318 | 382 | |
| 514305 | ICE CREAM MIXES (WHOLESALE) | 51 | 61 | |
| 202301 | ICE CREAM MIXES-MANUFACTURERS | 11 | 13 | |
| 581203 | ICE CREAM PARLORS | 14592 | 17510 | |
| 508482 | ICE CREAM-MANUFACTURERS EQUIPMENT (WHOL) | 57 | 68 | |
| 355610 | ICE CREAM-MANUFACTURERS SUPPLIES (MFRS) | 51 | 61 | |
| 356920 | ICE CRUSHING MACHINERY (MANUFACTURERS) | 16 | 19 | |
| 507823 | ICE HANDLING EQUIPMENT (WHOLESALE) | 3 | 4 | |
| 507828 | ICE MAKERS EQUIP-HOME & OFFICE (WHOL) | 4 | 5 | |
| 507811 | ICE MAKING EQUIPMENT & MACHINES (WHOL) | 3432 | 4118 | |
| 358505 | ICE MAKING EQUIPMENT & MACHINES-MFRS | 145 | 174 | |
| 735956 | ICE MAKING EQUIPMENT & MACHINES-RENTING | 87 | 104 | |
| 762305 | ICE MAKING EQUIPMENT & MACHS-RPR & CLEAN | 1057 | 1268 | |
| 516901 | ICE MELTING EQUIPMENT & SUPPLIES (WHOL) | 56 | 67 | |
| Y | ICE SCULPTORS | 88 | 106 | |
| 209702 | ICE SUBSTITUTES (MANUFACTURERS) | 3 | 4 | |
| 209701 | ICE-MANUFACTURERS | 592 | 710 | |
| 519912 | ICE-WHOLESALE | 301 | 361 | |
| 873208 | IDEAS-DEVELOPED MARKETED & ETC | 7 | 8 | |
| 999907 | IDENTIFICATION BUREAUS | 13 | ||
| 722105 | IDENTIFICATION CARD SERVICE | 398 | 478 | |
| 511311 | IDENTIFICATION CARDS (WHOLESALE) | 10 | 12 | |
| 399974 | IDENTIFICATION EQUIP & SUPLS-MFRS | 3 | 4 | |
| 504302 | IDENTIFICATION EQUIPMENT & SUPLS (WHOL) | 435 | 522 | |
| L | IGA | 19 | 23 | |
| L | IGA | 1642 | 1970 | |
| 369403 | IGNITION INTERLOCK DEVICES (MFRS) | 10 | 12 | |
| G | IHOP | 641 | 769 | |
| 733611 | ILLUSTRATORS | 6 | 7 | |
| 729947 | IMAGE CONSULTANTS-PERSONAL | 424 | 509 | |
| O | IMAGE PROCESSING EQUIPMENT & SYSTEMS | 25 | 30 | |
| T | IMAGING EQUIPMENT & SUPPLIES | 46 | 55 | |
| 811104 | IMMIGRATION & NATURALIZATION CONSULTANTS | 1620 | 1944 | |
| 753816 | IMPORTED AUTOMOBILE SERVICES | 33 | 40 | |
| 549921 | IMPORTED FOODS | 89 | 107 | |
| 509905 | IMPORTERS | 66052 | 79262 | |
| 553139 | IMPORTERS-AUTOMOTIVE-PARTS & SUPPLIES | 5 | 6 | |
| 508233 | IMPORTERS-CONTRACTORS EQUIP/SUPLS (WHOL) | 3 | 4 | |
| 599918 | IMPORTERS-RETAIL | 385 | 462 | |
| 347107 | IMPREGNATING | 43 | 52 | |
| 347115 | IMPREGNATING APPARATUS (MANUFACTURERS) | 4 | 5 | |
| 347116 | IMPREGNATING CASTINGS (MANUFACTURERS) | 6 | 7 | |
| 275911 | IMPRINTING | 80 | 96 | |
| 2835 | IN VITRO/IN VIVO DIAGNOSTIC SUBSTANCES | 197 | 236 | |
| 599959 | INCENSE | 178 | 214 | |
| 289917 | INCENSE-MANUFACTURERS | 10 | 12 | |
| 519972 | INCENSE-WHOLESALE | 5 | 6 | |
| 738967 | INCENTIVE PROGRAMS | 454 | 545 | |
| 508407 | INCINERATORS (WHOLESALE) | 141 | 169 | |
| 1 | INCINERATORS REPAIRING | 15 | 18 | |
| 356705 | INCINERATORS-MANUFACTURERS | 15 | 18 | |
| 507441 | INCINERATORS-SUPPLIES & PARTS (WHOL) | 9 | 11 | |
| 811112 | INCORPORATING COMPANIES | 258 | 310 | |
| L | INDEPENDENT AGENT | 3 | 4 | |
| L | INDEPENDENT AGENT | 30 | 36 | |
| L | INDEPENDENT AGENTS | 19 | 23 | |
| L | INDEPENDENT AGENTS | 4 | 5 | |
| L | INDEPENDENT AGENTS | 61 | 73 | |
| L | INDEPENDENT AGENTS | 122 | 146 | |
| L | INDEPENDENT AGENTS | 14775 | 17730 | |
| D | INDEPENDENT LIVING | 2066 | 2479 | |
| 805915 | INDEPENDENT LIVING SERVICES FOR DISABLED | 32 | 38 | |
| 274112 | INDEXING SVC-BOOK/PERIODICAL/ETC (MFRS) | 35 | 42 | |
| 594709 | INDIAN GOODS | 1814 | 2177 | |
| 391106 | INDIAN GOODS-MANUFACTURERS | 108 | 130 | |
| 509424 | INDIAN GOODS-WHOLESALE | 292 | 350 | |
| 864115 | INDIAN ORGANIZATIONS | 55 | 66 | |
| 839913 | INDIAN RESERVATIONS & TRIBES | 210 | 252 | |
| 382311 | INDICATORS-DIAL (MANUFACTURERS) | 3 | 4 | |
| 8322 | INDIVIDUAL & FAMILY SOCIAL SERVICES | 148403 | 178084 | |
| 637101 | INDIVIDUAL RETIREMENT ACCOUNTS | 91 | 109 | |
| 359998 | INDSTRL/COML MACHINERY/EQUIP NEC (MFRS) | 21370 | 25644 | |
| 507513 | INDUCTION HEATING EQUIPMENT (WHOLESALE) | 57 | 68 | |
| 356498 | INDUSTRIAL & COML FANS & BLOWERS (MFRS) | 65 | 78 | |
| 3564 | INDUSTRIAL & COMMERCIAL FANS & BLOWERS | 1494 | 1793 | |
| 35 | INDUSTRIAL & COMMERCIAL MACHINERY MFRS | 112717 | 135260 | |
| 3599 | INDUSTRIAL & COMMERCIAL MACHINERY NEC | 49287 | 59144 | |
| 5113 | INDUSTRIAL & PERSONAL SERVICE PAPER | 15043 | 18052 | |
| 511398 | INDUSTRIAL & PERSONAL SVC-PAPER (WHOL) | 160 | 192 | |
| 874836 | INDUSTRIAL CONSULTANTS | 591 | 709 | |
| 341203 | INDUSTRIAL CONTAINERS-MANUFACTURING | 7 | 8 | |
| 874838 | INDUSTRIAL DEVELOPMENTS | 985 | 1182 | |
| 769939 | INDUSTRIAL EQUIPMENT & SUPLS-REPAIRING | 145 | 174 | |
| 508522 | INDUSTRIAL EQUIPMENT & SUPPLIES (WHOL) | 8072 | 9686 | |
| 359915 | INDUSTRIAL EQUIPMENT & SUPPLIES-MFRS | 1065 | 1278 | |
| 2813 | INDUSTRIAL GASES | 900 | 1080 | |
| 874837 | INDUSTRIAL HYGIENE CONSULTANTS | 541 | 649 | |
| 2819 | INDUSTRIAL INORGANIC CHEMICALS NEC | 2144 | 2573 | |
| 281998 | INDUSTRIAL INORGANIC CHMCLS NEC (MFRS) | 1921 | 2305 | |
| 362505 | INDUSTRIAL INSTRUMENTATION (MFRS) | 30 | 36 | |
| 3823 | INDUSTRIAL INSTRUMENTS FOR MEASUREMENT | 2321 | 2785 | |
| 7218 | INDUSTRIAL LAUNDERERS | 739 | 887 | |
| 5084 | INDUSTRIAL MACHINERY & EQUIPMENT | 77841 | 93409 | |
| 382398 | INDUSTRIAL MEASURING/CNTRL INSTR (MFRS) | 1750 | 2100 | |
| 2869 | INDUSTRIAL ORGANIC CHEMICALS NEC | 962 | 1154 | |
| 286998 | INDUSTRIAL ORGANIC CHEMICALS NEC (MFRS) | 921 | 1105 | |
| 651208 | INDUSTRIAL PARKS | 1 | 1 | |
| 3543 | INDUSTRIAL PATTERNS | 1805 | 2166 | |
| 354302 | INDUSTRIAL PATTERNS (MANUFACTURERS) | 793 | 952 | |
| 3567 | INDUSTRIAL PROCESS FURNACES & OVENS | 1103 | 1324 | |
| 356798 | INDUSTRIAL PROCESS-FURNACES/OVENS (MFRS) | 444 | 533 | |
| 874840 | INDUSTRIAL RELATIONS CONSULTANTS | 6 | 7 | |
| 874894 | INDUSTRIAL RESEARCH | 7 | 8 | |
| 1446 | INDUSTRIAL SAND | 84 | 101 | |
| 144698 | INDUSTRIAL SAND | 50 | 60 | |
| 5085 | INDUSTRIAL SUPPLIES | 37687 | 45224 | |
| 3537 | INDUSTRIAL TRUCKS TRACTORS & TRAILERS | 925 | 1110 | |
| 353798 | INDUSTRIAL TRUCKS TRACTORS/TRLRS (MFRS) | 739 | 887 | |
| 3491 | INDUSTRIAL VALVES | 517 | 620 | |
| 349198 | INDUSTRIAL VALVES (MANUFACTURERS) | 475 | 570 | |
| 394410 | INFANTS EQUIPMENT & SUPPLIES-MFRS | 6 | 7 | |
| 513735 | INFANTS EQUIPMENT & SUPPLIES-WHOLESALE | 2 | 2 | |
| 513736 | INFANTS GARMENTS-WHOLESALE & MFRS | 18 | 22 | |
| 564104 | INFANTS WEAR | 1 | 1 | |
| J | INFECTIOUS DISEASES | 1555 | 1866 | |
| 832277 | INFERTILITY COUNSELING | 1 | 1 | |
| # | INFINITI | 159 | 191 | |
| 738959 | INFORMATION & REFERRAL SVCS | 1040 | 1248 | |
| 832266 | INFORMATION & REFERRAL SVCS-ARTS | 5 | 6 | |
| 832248 | INFORMATION & REFERRAL SVCS-HLTH PRGRMS | 33 | 40 | |
| 737501 | INFORMATION BROKERS-DOCUMENT DLVRY/RSRCH | 72 | 86 | |
| 899920 | INFORMATION BUREAUS | 1630 | 1956 | |
| 729981 | INFORMATION PROVIDER SERVICES-DIAL IT | 17 | 20 | |
| 7375 | INFORMATION RETRIEVAL SERVICES | 1157 | 1388 | |
| 737598 | INFORMATION RETRIEVAL SERVICES | 250 | 300 | |
| 504504 | INFORMATION RETRIEVAL SYSTS/EQUIP (WHOL) | 256 | 307 | |
| 737502 | INFORMATION SEARCH & RETRIEVAL SERVICE | 314 | 377 | |
| 382302 | INFRARED EQUIPMENT (MANUFACTURERS) | 137 | 164 | |
| 873415 | INFRARED INSPECTION SERVICE | 225 | 270 | |
| 2 | INGERSOLL-RAND | 312 | 374 | |
| 284209 | INK ERADICATORS (MANUFACTURERS) | 1 | 1 | |
| 289911 | INKS-MANUFACTURERS | 145 | 174 | |
| 508550 | INKS-MANUFACTURERS MATERIALS (WHOLESALE) | 154 | 185 | |
| 289301 | INKS-PRINTING & LITHOGRAPHING (MFRS) | 541 | 649 | |
| 511201 | INKS-WRITING & MARKING (WHOLESALE) | 61 | 73 | |
| 701102 | INNS | 526 | 631 | |
| 2816 | INORGANIC PIGMENTS | 324 | 389 | |
| 281698 | INORGANIC PIGMENTS (MANUFACTURERS) | 176 | 211 | |
| 734204 | INSECT CONTROL DEVICES | 210 | 252 | |
| 349612 | INSECT CONTROL DEVICES-MANUFACTURERS | 4 | 5 | |
| 519128 | INSECTICIDE BASES (WHOLESALE) | 2 | 2 | |
| 734202 | INSECTICIDES | 889 | 1067 | |
| 287901 | INSECTICIDES-MANUFACTURERS | 38 | 46 | |
| 519117 | INSECTICIDES-WHOLESALE | 29 | 35 | |
| 075103 | INSEMINATION SERVICE-ARTIFICIAL | 201 | 241 | |
| 999908 | INSERTS-SCREW THREAD | 33 | ||
| 508466 | INSPECTION DEVICES-INDUSTRIAL (WHOL) | 198 | 238 | |
| 738996 | INSPECTION SERVICE | 2267 | 2720 | |
| 1796 | INSTALLATION OF BUILDING EQUIPMENT NEC | 4691 | 5629 | |
| 179699 | INSTALLATION OR ERECTION-BLDG EQPT NEC | 54 | 65 | |
| 173123 | INSTALLATION SERVICE | 128 | 154 | |
| 1 | INSTANT PRINTERS | 5432 | 6518 | |
| 509904 | INSTITUTION SUPPLIES (WHOLESALE) | 36 | 43 | |
| 382598 | INSTRS-MEASURING/TESTING ELEC (MFRS) | 1313 | 1576 | |
| 509918 | INSTRUMENT CASES (WHOLESALE) | 51 | 61 | |
| 874223 | INSTRUMENTATION INDICATING CNTRL CNSLTNT | 60 | 72 | |
| 506389 | INSTRUMENTS (WHOLESALE) | 52 | 62 | |
| 3825 | INSTRUMENTS FOR MEASURING ELECTRICITY | 1502 | 1802 | |
| 769996 | INSTRUMENTS-INDUSTRIAL-REPAIRING | 56 | 67 | |
| 382505 | INSTRUMENTS-MEASURING (MANUFACTURERS) | 74 | 89 | |
| 9 | INSTY-PRINTS | 286 | 343 | |
| 565105 | INSULATED CLOTHING | 1 | 1 | |
| 308604 | INSULATED CONTAINERS & CARRIERS (MFRS) | 9 | 11 | |
| 353116 | INSULATION APPLYING MACHINERY (MFRS) | 3 | 4 | |
| 174205 | INSULATION CONTRACTORS-COLD & HEAT | 6721 | 8065 | |
| 503304 | INSULATION CONTRS-EQUIP/SUPLS (WHOL) | 229 | 275 | |
| 521140 | INSULATION MATERIALS-COLD & HEAT | 2131 | 2557 | |
| 308602 | INSULATION MATERIALS-COLD & HEAT-MFRS | 64 | 77 | |
| 503307 | INSULATION MATERIALS-COLD & HEAT-WHOL | 190 | 228 | |
| 506359 | INSULATION MATERIALS-ELECTRIC (WHOL) | 140 | 168 | |
| 329603 | INSULATION-MANUFACTURERS | 107 | 128 | |
| 641112 | INSURANCE | 196842 | 236210 | |
| Q | INSURANCE | 42220 | 50664 | |
| 641102 | INSURANCE ADJUSTERS | 5990 | 7188 | |
| 64 | INSURANCE AGENTS BROKERS & SERVICE | 214721 | 257665 | |
| 6411 | INSURANCE AGENTS BROKERS & SERVICE | 214721 | 257665 | |
| 641198 | INSURANCE AGENTS BROKERS & SERVICE | 145 | 174 | |
| 672601 | INSURANCE ANNUITIES | 1509 | 1811 | |
| 63 | INSURANCE CARRIERS | 30805 | 36966 | |
| 6399 | INSURANCE CARRIERS NEC | 248 | 298 | |
| 639999 | INSURANCE CARRIERS NEC | 48 | 58 | |
| 641104 | INSURANCE CONSULTANTS & ADVISORS | 12089 | 14507 | |
| 641121 | INSURANCE MANAGERS | 26 | 31 | |
| 641111 | INSURANCE-AUTOMOBILE | 9109 | 10931 | |
| 635103 | INSURANCE-BONDS | 251 | 301 | |
| 631102 | INSURANCE-BURIAL | 535 | 642 | |
| 632102 | INSURANCE-CANCER | 94 | 113 | |
| 631103 | INSURANCE-CHARTERED-LIFE-UNDERWRITERS | 157 | 188 | |
| 641110 | INSURANCE-CLAIM PROCESSING SERVICES | 2812 | 3374 | |
| 641114 | INSURANCE-EXCESS & SURPLUS | 56 | 67 | |
| 633102 | INSURANCE-FIRE | 289 | 347 | |
| 641108 | INSURANCE-GROUP | 913 | 1096 | |
| 641106 | INSURANCE-HEALTH & ACCIDENT | 3966 | 4759 | |
| 671903 | INSURANCE-HOLDING COMPANIES | 122 | 146 | |
| 641107 | INSURANCE-HOMEOWNERS | 2324 | 2789 | |
| 641103 | INSURANCE-INSPECTION & AUDITS | 534 | 641 | |
| 641125 | INSURANCE-INVESTIGATORS | 47 | 56 | |
| 635104 | INSURANCE-LIABILITY | 109 | 131 | |
| 641109 | INSURANCE-LIFE (AGENTS) | 10488 | 12586 | |
| 809934 | INSURANCE-MEDICAL EXAMINATIONS | 223 | 268 | |
| 641105 | INSURANCE-MOBILE HOME | 844 | 1013 | |
| 641122 | INSURANCE-PLAN ADMINISTRATORS | 64 | 77 | |
| 633101 | INSURANCE-PROPERTY & CASUALTY | 2973 | 3568 | |
| 641123 | INSURANCE-RATING BUREAUS | 34 | 41 | |
| 641116 | INSURANCE-REPORTS | 25 | 30 | |
| 631101 | INSURANCE-SAVINGS-BANK-LIFE | 14 | 17 | |
| 824918 | INSURANCE-SCHOOLS | 40 | 48 | |
| 636101 | INSURANCE-TITLE | 1333 | 1600 | |
| 781210 | INSURANCE-VIDEO & PHOTO PRODUCTION SVC | 3 | 4 | |
| 641115 | INSURED PROPERTY REPLACEMENT SERVICE | 58 | 70 | |
| 731925 | INTERACTIVE MEDIA | 100 | 120 | |
| 4131 | INTERCITY & RURAL BUS TRANSPORTATION | 4232 | 5078 | |
| 506514 | INTERCOMMUNICATION EQPT SYSTS/SVC (WHOL) | 1677 | 2012 | |
| 829963 | INTERIOR DECORATING & DESIGNING SCHOOLS | 6 | 7 | |
| 738960 | INTERIOR DECORATORS & DESIGNERS WORKROOM | 291 | 349 | |
| 738902 | INTERIOR DECORATORS DESIGN & CONSULTANTS | 30316 | 36379 | |
| 399921 | INTERIOR DECORATORS/DESIGNERS SUPLS-MFRS | 204 | 245 | |
| 571403 | INTERIOR DECORATORS/DESIGNERS SUPLS-RTL | 182 | 218 | |
| 519904 | INTERIOR DECORATORS/DSGNRS SUPLS (WHOL) | 1261 | 1513 | |
| 078105 | INTERIOR LANDSCAPING | 33 | 40 | |
| 8052 | INTERMEDIATE CARE FACILITIES | 29 | 35 | |
| 805298 | INTERMEDIATE CARE FACILITIES | 29 | 35 | |
| 3519 | INTERNAL COMBUSTION ENGINES NEC | 656 | 787 | |
| 351901 | INTERNAL COMBUSTION ENGINES NEC (MFRS) | 575 | 690 | |
| K | INTERNAL MEDICINE | 29633 | 35560 | |
| S | INTERNATIONAL | 407 | 488 | |
| 9721 | INTERNATIONAL AFFAIRS | 1868 | ||
| 874857 | INTERNATIONAL BUSINESS SERVICES | 109 | 131 | |
| 874878 | INTERNATIONAL CONSULTANTS | 1084 | 1301 | |
| 1 | INTERNATIONAL HOUGH | 35 | 42 | |
| 874247 | INTERNATIONAL MARKETING | 21 | 25 | |
| 679901 | INTERNATIONAL TRADE SERVICES | 250 | 300 | |
| 737416 | INTERNET HOME PAGE DEV CONSULTING | 186 | 223 | |
| 737415 | INTERNET SERVICE | 9472 | 11366 | |
| 473122 | INTERSTATE COMMERCE COMMISSION PRCTNRS | 2 | 2 | |
| 874224 | INVENTION CONSULTANTS & BROKERS | 81 | 97 | |
| 899919 | INVENTORS | 230 | 276 | |
| 738962 | INVENTORY SERVICE | 1000 | 1200 | |
| 362106 | INVERTERS (MANUFACTURERS) | 8 | 10 | |
| 738108 | INVESTIGATORS | 7322 | 8786 | |
| 6282 | INVESTMENT ADVICE | 41693 | 50032 | |
| 628213 | INVESTMENT ADVISORY REFERRAL SERVICE | 18 | 22 | |
| 621109 | INVESTMENT BANKERS | 97 | 116 | |
| 332401 | INVESTMENT CASTINGS (MANUFACTURERS) | 205 | 246 | |
| 628202 | INVESTMENT MANAGEMENT | 1569 | 1883 | |
| 621105 | INVESTMENT SECURITIES | 20782 | 24938 | |
| 628214 | INVESTMENT TRUSTS | 10 | 12 | |
| 621111 | INVESTMENTS | 3362 | 4034 | |
| 628215 | INVESTMENTS-TAX SHELTERED | 8 | 10 | |
| 6799 | INVESTORS NEC | 1311 | 1573 | |
| 679999 | INVESTORS NEC | 382 | 458 | |
| 275924 | INVITATIONS & ANNOUNCEMENTS-MFRS | 2 | 2 | |
| 594708 | INVITATIONS & ANNOUNCEMENTS-RETAIL | 7380 | 8856 | |
| 511233 | INVITATIONS & ANNOUNCEMENTS-WHOLESALE | 3 | 4 | |
| 283598 | IN-VITRO/IN-VIVO DIAGNOSTIC SBSTNC (MFR) | 197 | 236 | |
| 281912 | IODINE (MANUFACTURERS) | 5 | 6 | |
| E | IOOF (ODD FELLOWS) | 534 | 641 | |
| E | IOOF (ODD FELLOWS) | 52 | 62 | |
| 594733 | IRISH GOODS-RETAIL | 33 | 40 | |
| 0134 | IRISH POTATOES | 114 | 137 | |
| 3462 | IRON & STEEL FORGINGS | 1178 | 1414 | |
| 505109 | IRON (WHOLESALE) | 235 | 282 | |
| 1011 | IRON ORES | 18 | 22 | |
| 239211 | IRONING BOARD COVERS & PADS (MFRS) | 2 | 2 | |
| 349915 | IRONING BOARDS (MANUFACTURERS) | 11 | 13 | |
| 721208 | IRONING SERVICE | 13 | 16 | |
| 101198 | IRON-ORE | 18 | 22 | |
| 332507 | IRON-ORE (MANUFACTURERS) | 4 | 5 | |
| 281606 | IRON-OXIDE (MANUFACTURERS) | 3 | 4 | |
| 769204 | IRONWORK | 3005 | 3606 | |
| 342314 | IRONWORKING MACHINERY (MANUFACTURERS) | 1 | 1 | |
| 331205 | IRONWORK-MANUFACTURERS | 22 | 26 |