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

• Physicians & Surgeon Exchanges
• Telephones Answering & Secretarial Service
• Telephones Answering Service

North American Industry Classification System (NAICS) Categories:

• Telephone Answering Services
• Offices Of Physicians (Except Mental Health Specialists)

Standard Industry Classification (SIC) Categories:

• Business Services, Nec > Telephone Answering & Messenger Services > Telephone Answering Service
• Offices And Clinics Of Doctors Of Medicine