Enhanced Digital Systems is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Alarm Systems
• Internet
• School Business & Vocational Security Training

North American Industry Classification System (NAICS) Categories:

• Internet Publishing & Broadcasting & Web Search Portals
• Security Systems Services (Except Locksmiths)
• Other Technical And Trade Schools > Vocational & Technical Schools > Schools Security Training

Standard Industry Classification (SIC) Categories:

• Information Retrieval Services > Internet Services
• Security Systems Services
• Vocational Schools, Nec > Vocational & Technical Schools > Schools Security Training