Agricultural Research Service Air Rescue Service Automatic Restraint System Automatic Route Selection Adaptive Receptive System American Rocket Society Army Regulations Assignment Requests Access Routers Action Request System acute radiation syndrome Advanced Reconnaissance Satellite Advanced Record System Advanced Recovery System Air Reserve Station Air Revitalization System Alternate Route Selection American Radium Society amplified response spectrum Atmosphere Revitalization System Accruals Reporting System Active Repeater Satellite advance record system Advanced Reconnaissance System Aerial Reconnaissance and Surveillance aerial refueling store Agriculture Research Service Air Refueling Squadron Air Rescue Science Air Rescue Squadron