Presentation Time Stamp 
Payload Transportation System 
Profile Test Specification 
permanent threshold shift 
Polar Track Structure 
Position and Trunk Scanner 
pressurized thermal shock 
Program Test System 
Pure Time Sharing 
put to sleep 
page table shadowing 
Payload Test Set 
permanent threshold shifts 
Personal Telecommunications System 
Personnel Training System 
physical therapists 
Pilot Training System 
Points 
Portable Test Set 
posttraumatic stress 
Practical Test Standards 
Precise Time System 
Pressure Tuning Spectroscopy 
Proceed To Select 
Project Tracking System 
Propellant Transfer System 
Protocol Type Selection 
IATA code for Atkinson Municipal Airpo… 
Package Tracking System 
Packet Transport Switch