North American Industry Classification System (NAICS) 1997

• 81 - Other Services (except Public Administration)
• 813 - Religious, Grant-Making, Civic, and Professional and Similar Organizations
• 8133 - Social Advocacy Organizations

81331 - Social Advocacy Organizations

This industry comprises establishments primarily engaged in promoting a particular social or political cause intended to benefit a broad or specific constituency. Organizations of this type may also solicit contributions or sell memberships to support their activities.