National Core

National Core is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Employment Agencies
• Construction & Development

North American Industry Classification System (NAICS) Categories:

• New Single-Family Housing Construction (Except Operative Builders)
• Land Subdivision
• Employment Placement Agencies

Standard Industry Classification (SIC) Categories:

• General Contractors - Single-Family Houses
• Land Subdividers And Developers, Except Cemeteries
• Employment Agencies