Electrical Contractors, All Other Specialty Trade Contractors, Security Systems Services (except Locksmiths), Other Services to Buildings and Dwellings

Site Preparation Contractors

Commercial and Institutional Building Construction

Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction, Highway, Street, and Bridge Construction, Framing Contractors

Research and Development in the Social Sciences and Humanities

Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers

Truck, Utility Trailer, and RV (Recreational Vehicle) Rental and Leasing, General Rental Centers, Construction, Mining, and Forestry Machinery and Equipment Rental and Leasing

Other Noncitrus Fruit Farming

Other Electronic Parts and Equipment Merchant Wholesalers

Other Computer Peripheral Equipment Manufacturing, Computer and Computer Peripheral Equipment and Software Merchant Wholesalers, Custom Computer Programming Services, Other Computer Related Services, Computer Training

Nonresidential Property Managers

Engineering Services

Plumbing, Heating, and Air-Conditioning Contractors

Industrial Building Construction, Commercial and Institutional Building Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction

Industrial Building Construction, Commercial and Institutional Building Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction

Commercial Gravure Printing, Mail-Order Houses, Computer Systems Design Services

Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction

Engineering Services, Other General Government Support

All Other Specialty Trade Contractors

Electromedical and Electrotherapeutic Apparatus Manufacturing

New Single-Family Housing Construction (except Operative Builders), Residential Remodelers, Commercial and Institutional Building Construction, Framing Contractors, Finish Carpentry Contractors