Extension Service

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

• Government Offices Federal
• Information Bureaus & Services

North American Industry Classification System (NAICS) Categories:

• All Other Business Support Services > Business Information & Referral Services
• Executive Offices > Executive Offices Federal > Government Offices Federal

Standard Industry Classification (SIC) Categories:

• Business Services, Nec > Business Information & Referral Services
• Executive Offices > Executive Offices Federal > Government Offices Federal