236220 – General Contractors
238160 - Roofing Contractor
238210 – Electrical Contractors
238220 – Plumbing, Heating and Air
                 Conditioning
238320 - Painting and Wall Covering
332410 – Boiler and Heat Exchanger
335314 – Relay and Industrial Control
511210 - Software Publishers
517919 - All Other Telecommunications
518210 - Data Processing, Hosting, and Related Services
541330 – Engineering Services
541350 - Building Inspections Services
561210 – Facilities Support Services
561320 - Temporary Help Services

541511 - Custom Computer Programming Services
541512 - Computer Systems Design Services
541513 - Computer Facilities Management Services
541519 - Other Computer Related Services
541611 - Administrative Management and General Management                     Consulting Services 
541612 - Human Resources Consulting Services 
541613 - Marketing Consulting Services
541614 - Process, Physical Distribution
541618 - Other Management Consulting Services 
541690 - Other Scientific and Technical Consulting Services 
611420 - Computer Training
611430 - Professional and Management Development Training  611699 - All Other Miscellaneous Schools and Instruction  611710 - Educational Support Services
812930 - Parking Lots & Garages