I4 1 1

I4 1 1 is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Bureaus
• Information Bureaus & Services

North American Industry Classification System (NAICS) Categories:

• All Other Professional, Scientific, And Technical Services
• All Other Business Support Services > Business Information & Referral Services

Standard Industry Classification (SIC) Categories:

• Business Services, Nec
• Business Services, Nec > Business Information & Referral Services