| |
| Class Codes | Description |
| 005 | Tree Prune or Trim |
| 0006 | Farm, Vegetable |
| 007 | Threshing By Contractor |
| 009 | Logging |
| 0011 | Hydroponic Vegetable Production |
| 0013 | Landscape Contractor |
| 0036 | Milk Producer - Fluid Only |
| 055 | Sand, Gravel or Slag Digging or Excavation-Including Crushing |
| 059 | Mineral Milling |
| 0083 | Livestock (Not Dairy, Horses) Farm-Raising |
| 101 | Grain Milling |
| 104 | Yeast Mfg |
| 106 | Scrapple Mfg |
| 107 | Syrup or Molasses Refining |
| 108 | Malt Liquors Mfg & Distribution |
| 110 | Water Ice Mfg |
| 112 | Soft Drinks (Carbonated) Mfg - Bottled or Canned |
| 114 | Grease Mfg - Animal |
| 119 | Veal Patty Mfg - Plain or Breaded |
| 130 | Wool Reworking |
| 134 | Necktie Mfg - Knitted |
| 139 | Yarn Dyeing or Finishing |
| 161 | Work Clothing Mfg |
| 163 | Textile Manufacturing - Synthetic Materials |
| 165 | Mattress Mfg |
| 201 | Tanning |
| 204 | Slipper Mfg |
| 221 | Plastics Articles Mfg, Injection Molding |
| 222 | Plastics Articles Mfg, NOC |
| 225 | Rubber Good Mfg |
| 227 | Yarn, Plastic Coated-Made From Purchased Yarn |
| 255 | Paper or Pulp Mfg |
| 257 | Paper Box Mfg |
| 265 | Stationery Products Mfg |
| 301 | Sawmill |
| 305 | Carpentry Shop |
| 306 | Woodenware Mfg |
| 311 | Cabinet Works |
| 319 | Furniture Assembly |
| 323 | Woodenware Mfg |
| 327 | Upholstering - No Furniture Assembling |
| 402 | Smelting |
| 403 | Wire Mfg - Nonferrous |
| 404 | Steel Mfg |
| 406 | Wire Mfg |
| 407 | Tube Mfg - Iron or Steel |
| 411 | Steel Fabrication Shop Only |
| 413 | Iron Works |
| 415 | Fabricated Plate Work |
| 416 | Car Manufacturing - Railroad |
| 421 | Steel Foundry |
| 425 | Iron Foundry |
| 427 | Malleable Iron Foundry |
| 429 | Die Castings Mfg |
| 431 | Forging |
| 433 | Tool Mfg - Forged |
| 435 | Spring Mfg - Hot Wound |
| 445 | Hardware Mfg |
| 447 | Zinc Castings Mfg |
| 451 | Auto, Truck or Trailer Body Mfg. |
| 454 | Sheet Metal Products Fabrication, NOC |
| 456 | Tennis Racquet Mfg - Metal |
| 457 | Wire Goods Mfg |
| 461 | Machine Shop |
| 464 | Machine Mfg NOC |
| 465 | Conveyor or Hoisting Systems Mfg |
| 467 | Roller Bearing Mfg |
| 475 | Battery Mfg - Storage |
| 477 | Electric Motor Mfg or Repair |
| 501 | Cement Mfg |
| 502 | Plaster Statuary Mfg |
| 507 | Graphite Products Mfg |
| 511 | Concrete Products Mfg |
| 512 | Brick Mfg |
| 513 | Vitreous Tile Mfg/Pottery NOC |
| 553 | Industrial Gas Mfg |
| 573 | Plant Food Mfg - Mixed |
| 581 | Synthetic Rubber Mfg |
| 601 | Road/Street Construction: Paving |
| 602 | Street or Road Construction-Subsurface Work |
| 603 | Sewer/Storm Drain Construction |
| 605 | Railroad Maintenance Of Way - By Contractor |
| 607 | Well Drilling-Water & Drivers |
| 608 | Paving-Driveway - Blacktop or Cement/Concrete Works |
| 609 | Excavation |
| 611 | Pile Driving |
| 617 | Gas, Steam, Water Main Repair |
| 625 | Conduit Construction |
| 645 | Wallboard Installation - Within Bldgs |
| 646 | Fixture Installation |
| 647 | Insulation Work NOC |
| 648 | Carpentry - Cabinet Work |
| 649 | Ceiling Installation |
| 651 | Asbestos Abatement Contractor |
| 652 | Carpentry - Residential Work |
| 653 | Masonry |
| 654 | Concrete Construction |
| 655 | Iron Erection |
| 656 | Stringing Of Electric, Phone, Telegraph Lines |
| 657 | Rigging NOC |
| 658 | Iron Erection - ornamental or non-structural |
| 659 | Roofing - All Kinds |
| 660 | Phone Wiring Installation In Buildings |
| 661 | Electrical Wiring |
| 662 | Appliance Service or Repair |
| 663 | Asbestos Abatement Contractor-Pipe & Boiler Work Exclusively & Drivers |
| 664 | Heat, Ventilating, or AC Contractor |
| 665 | Painting |
| 666 | Wire Glass Installation |
| 668 | Tile, Stone, Mosaic or Terrazzo Work |
| 669 | Plastering NOC |
| 670 | Window Shade Installation |
| 673 | Sign Erection, Removal or Repair |
| 674 | Swimming Pool Construction |
| 675 | Machinery or Equipment Erection or Repair |
| 676 | Sheet Metal Installation |
| 677 | Boiler Installation |
| 679 | Advertising Company, Outdoor |
| 681 | Tent Installation |
| 716 | Marina |
| 718 | Boat Building or Repair |
| 753 | Waterworks |
| 759 | Cable TV - Installation Of New Systems-Not Towers |
| 801 | Stockyard |
| 808 | Trucking: Palletized Freight Only |
| 809 | Fuel Distribution |
| 811 | Trucking NOC; Tow Trucks (not including Repo Work) |
| 812 | Mail Hauling |
| 814 | Tractor Dealer-Including Service & Repair |
| 815 | Wagon Repairing |
| 855 | Lumberyard - Wholesale Only |
| 857 | Steel Warehouse - Including Incidental Cutting |
| 859 | Nonferrous Scrap Metal Dealer |
| 860 | Smelting Of Soft Scrap Metal By Scrap Metal Dealer |
| 862 | Waster Paper Dealer |
| 885 | Refrigeration System Parts, Accessories Dealer |
| 886 | Electronic Components, Accessories Dealer |
| 910 | Sausage Casings Dealer |
| 923 | Contract Packaging - Non-Crating |
| 924 | Wool Merchant |
| 926 | Welding Equipment or Supply Dealer |
| 992 | Septic Tank Cleaner |
| 999 | Cemetery Operation |
| 6824 | Boat Building or Repair |
| 6826 | Marina - Federal |
| 6843 | Ship Building - Iron/Steel |
| 6872 | Ship Cleaning, Repairing, Painting |
| 7309 | Stevedoring, NOC |
| 7317 | Stevedoring |
| 7327 | Stevedoring Containers |
