Airborne File Server Air Force Station Andrew File System Air Facility System Aeronautical Fixed Service Automatic Flight System Aerodrome Fire Service AIRS Facility Subsystem Auto Flight System Active Federal Service Active Fahrwerks Stabilierung Advanced Flying School Advanced Freephone Service Acoustic Firing System Advanced Flight Simulator Agency Filing Scheme Air Facility Subsystem Air Facility Sub-System Air Force Specialty Air Force Standard Airways Facilities Sector Alaska Fire Service American Fisheries Society atomic fluorescence spectrometry atomic fluorescence spectroscopy Audio-Frequency Shift Automation File Server auxiliary feedwater system a distributed product of transarc Academy of Financial Services