<p> Essentials of Firefighting (4th Edition) Commonly Used Abbreviations</p><p>AFFF Aqueous Film-Forming Foam ALI Automatic Location Identification ALS Advanced Life Support ANI Automatic (phone) Number Identification APW Air-Pressurized Water (extinguisher) ARFF Aircraft Rescue & Fire Fighting AVL Automatic Vehicle Locator BLS Basic Life Support CAD Computer-Aided Dispatch CB Citizens Band CIS Critical Incident Stress CISD Critical Incident Stress Debriefing CP Command Post DOT Department of Transportation E 9-1-1 Enhanced 911 EAP Employee's Assistance Program EMS Emergency Medical System EMT Emergency Medical Technician FCC Federal Communcations Commission FDC Fire Department Connection HVAC Heating, Ventilation, & Air Conditioning IAP Incident Action Plan IC Incident Command(er) IMS Incident Management System NBC Nuclear, Biological, and Chemical NFIRS National Fire Incident Reporting System NFPA National Fire Protection Association OATH OK, Advance, Take up, HELP OS&Y Outside Screw & Yoke PAD Personal Alert Device PASS Personal Alert Safety System PC Personal Computer PCBs Polychlorinated Biphenyls PIV Post Indicator Valve PIVA Post Indicator Valve Assembly SCBA Self-Contained Breathing Apparatus SCUBA Self-Contained Underwater Breathing Apparatus SOP Standard Operating Procedure TDD/TTY Telecommuncations Device for the Deaf / Teletype Text Phone UL Underwriter's Laboratories ULC Underwriter's Laboratories (Canada) USFA United States Fire Administration WPIV Wall Post Indicator Valve</p>