Security Guards and Patrol Services

Plumbing, Heating, and Air-Conditioning Contractors

Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers

All Other Specialty Trade Contractors

Surgical and Medical Instrument Manufacturing

Sporting and Recreational Goods and Supplies Merchant Wholesalers

Commercial and Institutional Building Construction

Lessors of Residential Buildings and Dwellings

New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders, Residential Remodelers, Industrial Building Construction

Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Main

Other Electric Power Generation, Power and Communication Line and Related Structures Construction, All Other Industrial Machinery Manufacturing, Other Commercial and Service Industry Machinery Manufacturing, Semiconductor and Related Device Manufacturing

Engineering Services

Vocational Rehabilitation Services

Plumbing, Heating, and Air-Conditioning Contractors

Environment, Conservation and Wildlife Organizations

In-Vitro Diagnostic Substance Manufacturing

Machine Shops

Wood Office Furniture Manufacturing, Office Furniture (except Wood) Manufacturing

Other Aircraft Parts and Auxiliary Equipment Manufacturing