Agricultural Research Service American Rocket Society Air Rescue Service acute radiation syndrome Advanced Reconnaissance Satellite Advanced Record System Advanced Recovery System Air Revitalization System American Radium Society amplified response spectrum Archive and Retrieval Subsystem Atmospheric Revitalization System Action Request System Active Repeater Satellite advance record system Air Rescue Science Air Reserve Station American Rhinologic Society Asbestos Roof Shingle Attitude Reference System Automatic Record System Automatic Route Selection Automatic Route Selection/Selector autonomously replicating sequence Salvage Ship Academic Resource System Accounting Resources System Accruals Reporting System ACE Reporting System acoustic resonance spectroscopy