Asynchronous Transfer Mode 
Air Traffic Management 
Apollo Telescope Mount 
Automatic Teller Machine 
Actuator Test Mode 
Adobe Type Manager 
Asynchronous Transport Mode 
Abstract Test Method 
Advanced Testing Methods 
Amateur Telescope Maker 
Asynchronous Transmission Mode 
Auxiliary Tape Memory 
Adobe Typeface Manager 
Air Turbine Motor 
Amateur Telescope Maker's 
Analog Trunk Module 
Asychronous Transfer Mode 
Automated Transaction Machine 
Automatic Tracking Mechanism 
Addendum to Traffic Management 
Air Traffic Managmeent 
Air Turbine Machine 
Airborne Terrain Mapper 
Aircraft Transportability Manual 
Alternative Test Method 
Amateur Telescope Makers 
Amateur Telescope Making 
Amended Timetable Manager 
Apollo Telecope Mount 
Apollo Telescope Mounts