All Other Industrial Machinery Manufacturing, Engineering Services, Custom Computer Programming Services, Computer Systems Design Services, Research and Development in the Social Sciences and Humanities

Electrical Contractors, Turbine and Turbine Generator Set Units Manufacturing, All Other Miscellaneous Electrical Equipment and Component Manufacturing, Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers

All Other Miscellaneous Textile Product Mills, Commercial Lithographic Printing, Textile Machinery Manufacturing, Direct Mail Advertising

Plumbing, Heating, and Air-Conditioning Contractors, Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipmen, Refrigeration Equipment and Supplies Merchant Wholesalers, Engineering Services

Fossil Fuel Electric Power Generation, Other Electric Power Generation, Electric Bulk Power Transmission and Control, Water Supply and Irrigation Systems, Construction Machinery Manufacturing

Other Electric Power Generation, Electric Power Distribution, Power and Communication Line and Related Structures Construction, Power Boiler and Heat Exchanger Manufacturing, Semiconductor Machinery Manufacturing

Optical Instrument and Lens Manufacturing

Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipmen

Electrical Contractors, Plumbing, Heating, and Air-Conditioning Contractors, Other Building Equipment Contractors, Hardware Manufacturing, Plumbing Fixture Fitting and Trim Manufacturing

Printing Machinery and Equipment Manufacturing, Photographic and Photocopying Equipment Manufacturing, Other Computer Peripheral Equipment Manufacturing

Welding and Soldering Equipment Manufacturing, Analytical Laboratory Instrument Manufacturing

Metal Tank (Heavy Gauge) Manufacturing, All Other Miscellaneous Fabricated Metal Product Manufacturing, Heating Equipment (except Warm Air Furnaces) Manufacturing, Industrial Process Furnace and Oven Manufacturing, Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial

EQUIPMENT TRL.

Manufacturing

Farm Machinery and Equipment Manufacturing

Unlaminated Plastics Profile Shape Manufacturing, Aluminum Extruded Product Manufacturing, Machine Shops, Precision Turned Product Manufacturing, Bolt, Nut, Screw, Rivet, and Washer Manufacturing

Power-Driven Handtool Manufacturing

Machine Shops, Optical Instrument and Lens Manufacturing, Other Aircraft Parts and Auxiliary Equipment Manufacturing, Guided Missile and Space Vehicle Manufacturing

Machine Shops, Precision Turned Product Manufacturing, Bolt, Nut, Screw, Rivet, and Washer Manufacturing, Metal Heat Treating, Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers

Optical Instrument and Lens Manufacturing, Semiconductor and Related Device Manufacturing