Process Action Teams 
Passive Anti Theft System 
Payload Avionics Test Station 
Partly Assisted Trading System 
Passive Anti-Theft System 
Pesticide Action Tracking System 
Pesticides Analytical Transport Soluti… 
Precision Attack Targeting System 
Program for Analysis of Time Series 
Programmable Automatic Test System 
Protection Assessment Test System 
INTERNATIONAL SUPERCONDUCTOR CORP. 
Pacific Animal Therapy Society 
packaging and transportation services 
Parameterized Abstract Test Suite 
Parametrized Abstract Test Suite 
Partnership Attitude Tracking Study 
Passive Angle Tracking System 
Patient Advocate Tracking System 
Pohnpei Agriculture and Trade School 
portable avionics test solution 
Precision Altimeter Techniques Study 
precision approach tracking system 
Precision Automated Tracking System 
precision automated turning system 
Precision Automatic Tracking System 
primary afferent terminals 
Process Actions Teams 
Program for the Analysis of Time Serie… 
prototype automatic target screener