Pulse Code Modulation 
Powertrain Control Module 
Pulse Code Modulated 
Pulse Coded Modulation 
Power Control Module 
pulse code modulator 
Personal Computer Manufacturer 
Phase Contrast Microscopy 
Physical Connection Management 
Primary Care Manager 
process control monitor 
Per Calendar Month 
phase change material 
Phase Change Materials 
Plug Compatible Module 
polarizable continuum model 
Power Control Mission 
Power cooling mismatch 
Process Change Management 
Process Control Module 
punched card machine 
Palliative Care Management 
Parallel Climate Model 
pending contractual matter 
Phase Conjugation Mirror 
Please Call Me 
Plug Compatible Machine 
Plug Compatible Mainframe 
Plug Compatible Manufacturer 
Plutonium contaminated material