| Acronym | Definition |
|---|
| PCA | Principal Component Analysis |
| PCA | Portland Cement Association |
| PCA | Porsche Club of America |
| PCA | Pollution Control Agency |
| PCa | Prostate Cancer |
| PCA | Patient-Controlled Analgesia (pain medication delivery) |
| PCA | Presbyterian Church in America |
| PCA | Personal Care Attendant |
| PCA | Positive Coaching Alliance (Palo Alto, CA) |
| PCA | Plant Conservation Alliance |
| PCA | Profit Center Accounting |
| PCA | Permanent Court of Arbitration |
| PCA | Principle Component Analysis |
| PCA | Partnership and Cooperation Agreement |
| PCA | Popular Culture Association |
| PCA | People's Choice Awards |
| PCA | Professional Cricketers' Association |
| PCA | Police Complaints Authority (UK) |
| PCA | Prompt Corrective Action |
| PCA | Philippine Coconut Authority |
| PCA | Personal Internet Client Architecture (Intel) |
| PCA | Prestonwood Christian Academy (Plano, TX) |
| PCA | Physical Configuration Audit |
| PCA | Power Cost Adjustment |
| PCA | Posterior Cerebral Artery |
| PCA | Packaging Corporation of America |
| PCA | Policy Certification Authority |
| PCA | Prevent Child Abuse America (since 1972; Chicago, Illinois) |
| PCA | Printed Circuit Assembly |
| PCA | Project Cooperation Agreement |
| PCA | Programmable Counter Array (microcontroller) |
| PCA | Parliamentary Commissioner for Administration (UK, aka Parliamentary Ombudsman) |
| PCA | Perchloric Acid (chemistry) |
| PCA | Proportional Counter Array |
| PCA | Pest Control Advisor |
| PCA | Primary Care Association |
| PCA | Professional Chess Association |
| PCA | Production Code Administration |
| PCA | Polar Cap Absorption |
| PCA | Power Calibration Area |
| PCA | Patient Care Associate |
| PCA | Poodle Club of America |
| PCA | Plate Count Agar |
| PCA | Personal Care Aide |
| PCA | Property Condition Assessment |
| PCA | Professional Claims Adjuster |
| PCA | Production Credit Association (farmer cooperative loan agency established under the Farm Credit Act in 1934) |
| PCA | Pyrrolidone Carboxylic Acid |
| PCA | Pacific Coast Academy |
| PCA | Panama Canal Authority |
| PCA | Partido Comunista de Andalucia (Spanish political party) |
| PCA | Perfect Clarity Audio (Sonic Foundry) |
| PCA | Posterior Cricoarytenoid (muscle) |
| PCA | Pre-Conditioned Air |
| PCA | Propulsion Controlled Aircraft |
| PCA | Posse Comitatus Act of 1878 |
| PCA | Prescribed Concentration of Alcohol (NSW, Australia) |
| PCA | Professional Caddies Association |
| PCA | Point of Closest Approach |
| PCA | Progressive Corrective Action (Centers for Medicare and Medicaid Services; various locations) |
| PCA | Packaging Council of Australia |
| PCA | Permanent Change of Assignment |
| PCA | Predator Conservation Alliance |
| PCA | Prudential Corporation Asia |
| PCA | Policy Creation Authority |
| PCA | Permanent Corrective Action |
| PCA | Personal Communications Assistant (Voxicom) |
| PCA | Program Commitment Agreement |
| PCA | Paperweight Collectors Association, Inc |
| PCA | Parallel Channel Adapter (Cisco) |
| PCA | Positive Control Area |
| PCA | Power Control Algorithm |
| PCA | Primary Component Analysis |
| PCA | Power Control Assembly |
| PCA | Plumbing Contractors of America |
| PCA | Password Call Acceptance (call screening) |
| PCA | Physicians' Comparability Allowances |
| PCA | Power Challenge Array |
| PCA | Post Curing Apparatus (UV light curing chamber for post processing of stereolithography parts) |
| PCA | Progressive Christian Academy (Temple Hills, MD) |
| PCA | Poste de Commandement Avance |
| PCA | Physiological Cross-Sectional Area |
| PCA | Petroleum (Consolidation) Act 1928 (UK) |
| PCA | Protective Connecting Arrangement |
| PCA | Pork Council of Australia |
| PCA | Pesticide Control Authority |
| PCA | Portland Concert Association (Portland, ME) |
| PCA | Process Control & Automation |
| PCA | Protection Channel Access (Sprint) |
| PCA | Penang Chess Association (Malaysia) |
| PCA | Purnell Center for the Arts (Carnegie Mellon University) |
| PCA | Prime Candidate Alloy |
| PCA | Patient Care Advocate |
| PCA | Prospective Computer Analysts Inc |
| PCA | Project Control Analyst |
| PCA | Parallel Cellular Automata |
| PCA | Plug-In Compliant Application |
| PCA | Primary Cutaneous Amyloidosis (skin disorder) |
| PCA | Process Corrective Action |
| PCA | Primary Controlling Authority |
| PCA | Pacific Commercial Advertiser (Hawaii newspaper) |
| PCA | Parent Coaches Association |
| PCA | Plasticville Collectors Association |
| PCA | Press Cuttings Agency |
| PCA | Procrastinators Club of America (est. 1956) |
| PCA | Parallel Channel Attach(ment) |
| PCA | Peace and Community Action (Sri Lanka) |
| PCA | Polish Classification of Activities |
| PCA | Proper Civilian Attire |
| PCA | People's Christian Academy |
| PCA | Personal Channel Agent |
| PCA | Printed Circuit Antenna |
| PCA | Petaluma Community Access TV (Petaluma, CA) |
| PCA | Plastics Convertors Association (South Africa) |
| PCA | Psychological Consolidation Activities |
| PCA | Process Change Authorization |
| PCA | Planned Capability Available (FAA) |
| PCA | Property Clearance Assessment |
| PCA | Pacific Communications Area |
| PCA | Posterior Choanal Atresia |
| PCA | Paul Collins Associates (Huntington Beach, CA) |
| PCA | Principal Control Authority |
| PCA | Personalized Claim Administration (Mutual of Omaha) |
| PCA | Pacific Cruising Association |
| PCA | Propellant Control Assembly |
| PCA | Professional Cyclists Association |
| PCA | Pedagogical Conversational Agent |
| PCA | Product Complaint Analysis |
| PCA | Primary Control Assembly |
| PCA | Primary Coolant Activity |
| PCA | Poultrymen's Cooperative Association (Riverside, California) |
| PCA | PCAnywhere Remote/Host Software (Symantec) |
| PCA | Probable Course of Action |
| PCA | Program Configuration Audit |
| PCA | Primary Crash Alarm |
| PCA | Physical Configuration/Control Audit |
| PCA | Personal Cash Allowance |
| PCA | Property Claims Agreement (insurance) |
| PCA | Personal Computer Association, Inc. |
| PCA | Pension Corporation of America (Cincinnati, OH) |
| PCA | Provisioning Consistency Audit |
| PCA | Product Change Authority |
| PCA | petroleum caking additive |
| PCA | Power Control and Alarm |
| PCA | Port Configuration Automation |
| PCA | Project Change Authorization |
| PCA | Procedure Change Activity |
| PCA | Peoria Cosmetology Association |
| PCA | Preliminary Configuration Audit |
| PCA | Polar Cap Anomaly |
| PCA | Post-Construction Availability |
| PCA | Planar Cellular Array |
| PCA | Program Cumulative Audiences |
| PCA | Proportional Capacity Allocation |
| PCA | Principles, Constraints, and Assumptions |
| PCA | Pool Car Administrator |
| PCA | Polynomial Computer Algebra |