| SIC | Category | Count |
| 1731-23 | INSTALLATION SERVICE | 1179
|
| 2024-98 | ICE CREAM & FROZEN DESERTS (MFRS) | 1672
|
| 2369-01 | INFANTS GARMENTS-MANUFACTURERS | 813
|
| 2741-05 | INTERNET PUBLISHING | 5920
|
| 2819-98 | INDUSTRIAL INORGANIC CHMCLS NEC (MFRS) | 1995
|
| 2893-01 | INKS-PRINTING & LITHOGRAPHING (MFRS) | 508
|
| 3462-01 | IRON & STEEL FORGINGS (MANUFACTURERS) | 1116
|
| 3519-01 | INTERNAL COMBUSTION ENGINES NEC (MFRS) | 559
|
| 3537-98 | INDUSTRIAL TRUCKS TRACTORS/TRLRS (MFRS) | 815
|
| 3567-98 | INDUSTRIAL PROCESS-FURNACES/OVENS (MFRS) | 448
|
| 3599-98 | INDSRL/COML MACHINERY/EQUIP NEC (MFRS) | 18951
|
| 3825-98 | INSTRS-MEASURING/TESTING ELEC (MFRS) | 1275
|
| 3999-21 | INTERIOR DECORATORS/DESIGNERS SUPLS-MFRS | 293
|
| 4971-02 | IRRIGATION COMPANIES | 290
|
| 5045-04 | INFORMATION RETRIEVAL SYSTS/EQUIP (WHOL) | 257
|
| 5065-14 | INTERCOMMUNICATION EQPT SYSTS/SVC (WHOL) | 1488
|
| 5078-11 | ICE MAKING EQUIPMENT & MACHINES (WHOL) | 3130
|
| 5084-27 | INDUSTRIAL MACHINERY & EQUIPMENT (WHOL) | 2332
|
| 5099-05 | IMPORTERS | 60782
|
| 5199-04 | INTERIOR DECORATORS/DSGNRS SUPLS (WHOL) | 1275
|
| 5199-99 | IMAGE PROCESSING EQUIP & SYSTEMS (WHOL) | 456
|
| 5812-03 | ICE CREAM PARLORS | 15093
|
| 5943-02 | INDEXING SYSTEMS & SUPPLIES | 1291
|
| 5947-09 | INDIAN GOODS | 1718
|
| 5999-04 | INTERNET SVCS-TELEPHONE EQPT/SYST DEALERS | 8478
|
| 5999-18 | IMPORTERS-RETAIL | 372
|
| 5999-77 | ICE | 2315
|
| 6211-05 | INVESTMENT SECURITIES | 22017
|
| 6282-02 | INVESTMENT MANAGEMENT | 3030
|
| 6311-02 | INSURANCE-BURIAL | 536
|
| 6331-01 | INSURANCE-PROPERTY & CASUALTY | 2945
|
| 6361-01 | INSURANCE-TITLE | 1407
|
| 6411-03 | INSURANCE-INSPECTION & AUDITS | 462
|
| 6411-05 | INSURANCE-MOBILE HOME | 805
|
| 6411-07 | INSURANCE-HOMEOWNERS | 2795
|
| 6411-09 | INSURANCE-LIFE (AGENTS) | 9907
|
| 6411-11 | INSURANCE-AUTOMOBILE | 9771
|
| 6531-04 | INVESTMENTS-REAL ESTATE | 7322
|
| 6799-99 | INVESTORS NEC | 778
|
| 7221-05 | IDENTIFICATION CARD SERVICE | 382
|
| 7299-47 | IMAGE CONSULTANTS-PERSONAL | 368
|
| 7342-01 | INSECTS | 22437
|
| 7342-04 | INSECT CONTROL DEVICES | 267
|
| 7359-49 | INDUSTRIAL EQUIPMENT & SUPPLIES-RENTAL | 8516
|
| 7373-14 | INTERNET SVCS-NETWORK DESIGNERS/CONSLN | 878
|
| 7374-16 | INTERNE HOME PAGE DEV CONSULTING | 4140
|
| 7375-05 | INTERNET SVCS-INTERNE ON-LINE SVCS | 1140
|
| 7381-08 | INVESTIGATORS | 7402
|
| 7389-02 | INTERIOR DECORATORS DESIGN & CONSULTANTS | 32338
|
| 7389-32 | INFORMATION & REFERRAL SVCS-CONVENTION | 840
|
| 7389-60 | INTERIOR DECORATORS & DESIGNERS WORKROOM | 282
|
| 7389-67 | INCENTIVE PROGRAMS | 424
|
| 7623-05 | ICE MAKING EQUIPMENT & MACHS-RPR & CLEAN | 1039
|
| 7999-01 | ICE ARENAS | 2844
|
| 8071-12 | IMAGING SERVICES | 682
|
| 8111-04 | IMMIGRATION & NATURALIZATION SERVICES | 1800
|
| 8322-03 | INFORMATION & REFERRAL SVCS-BIRTH CNTRL | 2117
|
| 8322-16 | INFORMATION & REFERRAL SVCS-NURSING HOME | 418
|
| 8399-02 | INFORMATION & REFERRAL SVCS-ALCOHOLISM | 13944
|
| 8748-37 | INDUSTRIAL HYGIENE CONSULTANTS | 531
|
| 8748-78 | INTERNATIONAL CONSULTANTS | 1051
|
| 8999-20 | INFORMATION BUREAUS | 1311
|