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

• Burglar Alarm Systems
• Burglar Alarm Systems & Monitoring Services
• Security Control Equipment & Systems & Monitoring
• Security Service & Systems
• Television Systems Closed Circuit Telecasting

North American Industry Classification System (NAICS) Categories:

• Electrical Apparatus And Equipment, Wiring Supplies, And Related Equipment Merchant Wholesalers > Alarms, Signaling & Security Equipment > Burglar Alarm Systems
• Electrical Apparatus And Equipment, Wiring Supplies, And Related Equipment Merchant Wholesalers > Alarms, Signaling & Security Equipment > Security Control Equipment
• Other Electronic Parts And Equipment Merchant Wholesalers > Radio & Television Equipment > Television Systems Closed Circuit Telecasting
• Security Systems Services (Except Locksmiths) > Anti-Theft Alarm Systems Services > Bank Protective Equipment
• Security Systems Services (Except Locksmiths) > Anti-Theft Alarm Systems Services > Burglar Alarm Systems Monitoring Services

Standard Industry Classification (SIC) Categories:

• Electrical Apparatus & Equipment > Alarms, Signaling & Security Equipment > Burglar Alarm Systems
• Electrical Apparatus & Equipment > Alarms, Signaling & Security Equipment > Security Control Equipment
• Electronic Parts & Equipment > Radio & Television Equipment > Television Systems Closed Circuit Telecasting
• Security Systems Services > Anti-Theft Alarm Systems Services > Bank Protective Equipment
• Security Systems Services > Anti-Theft Alarm Systems Services > Burglar Alarm Systems Monitoring Services