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1. CONSTRUCTION SERVICES, GENERAL (INCL. MAINTENANCE AND REPAIR 2. MISCELLANEOUS SERVICES, NO. 1 (NOT OTHERWISE CLASSIFIED) 3. AUDIO-VISUAL EQUIPMENT MAINTENANCE AND REPAIR 4. CABLE CONSTRUCTION, INSTALLATION AND MAINTENANCE (FIBER OPTI 5. COMMUNICATIONS EQUIPMENT MANUFACTURING SERVICES 6. ACCESS CONTROL SYSTEMS AND SECURITY SYSTEMS 7. COMMUNICATION SECURITY SYSTEMS 8. VIDEO AND AUDIO SYSTEMS, ACCESSORIES AND PARTS (CLOSED CIRCU