Asynchronous Transfer Mode 
Air Traffic Management 
Apollo Telescope Mount 
Automatic Teller Machine 
Automated Teller Machine 
Actuator Test Mode 
Adobe Type Manager 
Air Tasking Message 
Asynchronous Transport Mode 
at the moment 
Airborne Thematic Mapper 
Amateur Telescope Maker 
Asynchronous Transmission Mode 
AUTO-MATE 
Auxiliary Tape Memory 
Auxiliary Transport Module 
Abstract Test Method 
Adaptive triangular mesh 
Adobe Typeface Manager 
Advanced Testing Methods 
Advanced Traffic Management 
advanced trauma management 
air target material 
Air Target Materials 
Air Targeting Mode 
Air Turbine Motor 
Airborne Topographic Mapper 
Aircrew Training Manual 
Amateur Telescope Maker's 
Amsterdam Treasury Bond Market