Pro Tech

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

• Bulletin Boards & Online Services
• Internet

North American Industry Classification System (NAICS) Categories:

• All Other Telecommunications > Online Service Providers
• Internet Publishing & Broadcasting & Web Search Portals

Standard Industry Classification (SIC) Categories:

• Information Retrieval Services > Internet Services
• Information Retrieval Services > Online Service Providers & Bulletin Boards