| SIC CODE | CATEGORY HEADING |
| 01 | Agricultural, Crops |
| 02 | Agricultural, Live Production |
| 07 | Agricultural Services |
| 08 | Forestry |
| 09 | Fisheries |
| 10 | Mining, Metal |
| 12 | Mining, Bituminous & Lignite |
| 13 | Oil & Gas |
| 14 | Stone Minerals |
| 15 | Contractors, General Building |
| 16 | Contractors, Heavy Construction |
| 17 | Contractors, Special Trades |
| 20 | Manufacturing, Food |
| 21 | Manufacturing, Tobacco |
| 22 | Manufacturing, Textile Products |
| 23 | Manufacturing, Apparel & Related |
| 24 | Manufacturing, Lumber & Wood Products |
| 25 | Manufacturing, Furniture & Fixtures |
| 26 | Manufacturing, Paper & Alled Products |
| 27 | Manufacturing, Publishing & Printing |
| 28 | Manufacturing, Chemicals & Allied Products |
| 29 | Manufacturing, Petroleum Refining & Related |
| 30 | Manufacturing, Rubber & Plastics |
| 31 | Manufacturing, Leather & Products |
| 32 | Manufacturing, Stone, Clay, Glass Products |
| 33 | Manufacturing, Primary Metal Industries |
| 34 | Manufacturing, Fabricated Metal Products |
| 35 | Manufacturing, Machinery Except Electrical |
| 36 | Manufacturing, Electrical Equipment |
| 37 | Manufacturing, Transportation Equipment |
| 38 | Manufacturing, Instruments & Related Products |
| 39 | Manufacturing, Miscellaneous Products |
| 40 | Transportation, By Rail |
| 41 | Transportation, Local |
| 42 | Trucking / Warehouse |
| 43 | U.S. Postal |
| 44 | Transportation By Water |
| 45 | Transportation By Air |
| 46 | Pipelines, Except Natural Gas |
| 47 | Transportation Svcs. |
| 48 | Communication |
| 49 | Elec., Gas, Sanitary Svcs. |
| 50 | Wholesale |
| 51 | Wholesale |
| 52 | Retail, Building Materials & Hardware Stores |
| 53 | Retail, General Merchandise Stores |
| 54 | Retail, Food Stores |
| 55 | Retail, Auto Dealers, Service Stations |
| 56 | Retail, Apparel & Accessories Stores |
| 57 | Retail, Furniture & Home Furnishings |
| 58 | Retail, Eating & Drinking Places |
| 59 | Retail, Miscellaneous Retail Stores |
| 60 | Banking |
| 61 | Credit, Except Banks |
| 62 | Securities Brokers |
| 63 | Insurance Carriers |
| 64 | Insurance Agents, Brokers |
| 65 | Real Estate |
| 67 | Holdings, Real Estate |
| 70 | Hotels, Recreational Lodging |
| 72 | Personal Services |
| 73 | Misc. Business Services |
| 75 | Auto Repair, Services |
| 76 | Misc. Repair Services |
| 78 | Motion Pictures |
| 79 | Amusement Recreation Svcs. |
| 80 | Health Care Svcs. |
| 81 | Legal Services |
| 82 | Educational Services |
| 83 | Social Services |
| 84 | Museums, Gardens, Zoos |
| 86 | Membership Organizations |
| 87 | Engineering, Accounting, Consulting |
| 89 | Miscellaneous Services |
| 91 | Government, Legislative & General Government |
| 92 | Government, Justice & Public Safety |
| 93 | Government, Public Finance & Taxation Pol |
| 94 | Government, Admin. - Human Resource Prgrms. Government, Admin. - Environmental Quality |
| 95 | Prgrms |
| 96 | Government, Admin. of Economic Programs |
| 97 | Government, National Security - International |
| 99 | Non Classifiable |