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236110: Residential Building Construction
236220: Commercial and Institutional Building Construction
238210: Electrical Contractors and Other Wiring Installation Contractors
238160: Roofing Contractors
238220: Plumbing, Heating, and Air-Conditioning Contractors
238290: Other Building Equipment Contractors
541380: Testing Laboratories
541512: Computer Systems Design Services
541513: Computer Facilities Management Services
541519: Other Computer Related Services
541611: Administrative Management and General Management Consulting Services
541690: Other Scientific and Technical Consulting Services
541715: Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
561621: Security Systems Services (except Locksmiths)
561720: Janitorial Services
561730: Landscaping Services
621110: Offices of Physicians
621399: Offices of All Other Miscellaneous Health Practitioners
621512: Diagnostic Imaging Centers
622310: Specialty (except Psychiatric and Substance Abuse) Hospitals
623110: Nursing Care Facilities (Skilled Nursing Facilities)
811212: Computer and Office Machine Repair and Maintenance
811310: Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
812990: All Other Personal Services