Programmable Automation Controllers 
Patriot Advanced Capability 
Pacific Accreditation Cooperation 
powdered activated carbon 
Parent Advisory Council 
Perceptual Audio Coder 
Planned Amortization Class 
Plasma arc cutting 
Political Action Committee 
Portable Air Compressor 
Privilege Attribute Certificate 
Program Advisory Committee 
P1-derived artificial chromosome 
Pacific 
Parent Advisory Committee 
Personal Analog Computer 
Personnel Actions Center 
Post Award Conference 
Predict Application Control 
Premature Atrial Contraction 
Probe Aerodynamic Center 
Products of Ambulatory Care 
Professional Activities Committee 
Program Assistance Center 
Programmable Automation Controller 
Programme Advisory Committee 
Public Advisory Committee 
Pan Africanist Congress 
Parents Advisory Council 
Performing Arts Center