C-Mark

C-Mark is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Telecommunications Contractors
• Telecommunications Telephone Equipment & Systems Supplies & Parts

North American Industry Classification System (NAICS) Categories:

• Electrical Contractors > Electronic & Communications Contractors > Telecommunications Contractors
• Radio, Television, And Other Electronics Stores > Telephone & Communication Equipment

Standard Industry Classification (SIC) Categories:

• Electrical Work > Electronic & Communications Contractors > Telecommunications Contractors
• Miscellaneous Retail Stores, Nec > Telephone & Communication Equipment