Philosophical Research Society is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Book Dealers Retail
• Church & Religious Associations & Organizations
• Halls Auditoriums & Meeting Rooms
• School Colleges & Universities

North American Industry Classification System (NAICS) Categories:

• Book Stores
• All Other Business Support Services > Convention Trade Show & Promotional Services
• Colleges, Universities, And Professional Schools
• Religious Organizations

Standard Industry Classification (SIC) Categories:

• Book Stores
• Business Services, Nec > Convention Trade Show & Promotional Services
• Colleges, Universities, & Professional Schools
• Religious Organizations