Program Commit Agreement 
Physical Configuration Audit 
Program Commitment Agreement 
Principal Component Analysis 
Proportional Counter Array 
Patient Controlled Analgesia 
Portland Cement Association 
printed circuit assembly 
Performance and Coverage Analyzer 
Physical Configuration Audits 
Polar Cap Absorption 
Policy Creation Authority 
Power Calibration Area 
Power Control Assembly 
Progressive Corrective Action 
Paid Claims Accuracy 
Password Call Acceptance 
Permanent Change of Assignment 
Pneumatic Control Assembly 
point of closest approach 
Policy Certification Authority 
Pool critical assembly 
Positive Control Area 
Principal Components Analysis 
Principle Component Analysis 
Parallel Channel Adapter 
Parts Control Area 
Payload Clamp Assembly 
Payload Control Area 
Permanent Court of Arbitration