Assisted Reproductive Technology 
Advanced Resolution Technology 
Air Reserve Technician 
Airborne Receive Terminal 
ARTIC-TRAVELER 
Adaptive Resonance Theory 
Advanced Rotorcraft Transmission 
Anti Retroviral Therapy 
Army Regional Tools 
Article 
AUTOMATIC REPORTING TELEPHONE 
absolute rate theory 
Accredited Record Technician 
advanced reasoning tool 
Advanced Recycling Technologies 
Advanced Registry Tracer 
Advanced Reusable Technology 
Aerospace Research and Technology 
Aggression Replacement Training 
Airborne Radiation Thermometer 
alarm response team 
algebraic reconstruction technique 
Alternate Resonance Toning 
Amateur Radio Transceiver 
Ambiguity Reference Tone 
Annual Renewable Term 
Arab Radio and Television 
arterial 
artery 
Artificial