Planned Maintenance System 
Program Managers 
Peripheral Modules 
Payment Management System 
Performance Management System 
Preventive Maintenance System 
Performance Measurement System 
Picturephone Meeting Service 
pre-main sequence 
Processor Memory Switch 
Property Management System 
Policy Management System 
Product Managers 
Program Management System 
project managers 
Pantone Matching System 
Pavement Management System 
Pedestal Mounted Stinger 
Performance Monitoring System 
Personal Mailing System 
Personnel Management Specialist 
Physiological Monitoring System 
plant monitoring system 
Platform Management System 
Power Management System 
Premenstrual Syndrome 
Program Management Staff 
Program Master Schedule 
PROMES 
Public Message System