PCA

PCA may stand for:

Science

• 4-Chloroamphetamine (Para-chloroamphetamine)
• Partial Coherence Analysis
• Patient-controlled analgesia (Medicine)
• Personal Computer Analyzer, a type of multichannel analyzer used in nuclear and particle physics
• Plate count agar (Microbiology)
• Posterior cortical atrophy (Medicine)
• Posterior cerebral artery (Neuroscience)
• Prostate Cancer, written as PCa
• Principal components analysis (statistics)
• Protein-fragment Complementation Assay

Politics

• Parti Communiste Algérien (Algerian Communist Party)
• Partido Comunista de Andalucía (Communist Party of Andalusia)
• Partido Comunista de Aragón (Communist Party of Aragon)
• Partido Comunista de la Argentina (Communist Party of Argentina)

Technology

• Patch Check Advanced, a patch manager for Solaris
• PC Anywhere, remote control software by Symantec
• Physical Configuration Audit
• Program Compatibility Assistant, a feature new in Windows Vista
• Propulsion Controlled Aircraft, a NASA-developed software system for landing an aircraft even if all hydraulics have been lost
• Printed circuit assembly
• Prioritized Contention Access, a mechanism for mediating access to a common channel, see Access contention

Other

• Pacific Coast Academy, the fictional school in which the Nickelodeon television series Zoey 101 is set
• Partnership and Cooperation Agreement
• Pedestrian Council of Australia
• People's Choice Awards
• Peoples Christian Academy, a private Christian school in Toronto, Ontario, Canada.
• Pensacola Christian Academy, a private christian school in Pensacola, Florida.
• Permanent Change of Assignment, a military reassignment whereby the member is reassigned to a different unit on the same post or base they are presently assigned (compare to PCS)
• Permanent Court of Arbitration, based in The Hague and the oldest international institution for dispute resolution
• Person Centered Approach, also known as Rogerian psychotherapy, see Carl Rogers
• Personal Carbon Allowance, a ration of allowed carbon emissions for individuals, designed to help address human-caused global warming
• Personal Capability Assessment, replaces the 'All Work Test' (previously used by the UK 'Benefits Medical Service') in relation to 'Incapacity Benefit' eligibility
• Pittsburgh Classical Academy Middle School
• Plano Christian Academy
• Plant Conservation Alliance
• PokerStars Caribbean Poker Adventure, European Poker Tour event
• Police Complaints Authority, responsible for overseeing the handling of complaints against the police in England and Wales until 2004
• Polymorphous Computer Architectures
• Popular Culture Association
• Porsche Club of America
• Portland Cement Association, institution that represents cement companies in the United States and Canada.
• Positive Coaching Alliance, national nonprofit organization
• Post Cognitive Awareness
• Pre-Conditioned Air, airport facility for ground-based aircraft climatisation (APU turned off)
• Predator Conservation Alliance
• Presbyterian Church in America
• Presbyterian Church of Australia
• Production Code Administration, a division of the Motion Picture Association of America
• Professional Chess Association
• Protected concerted activity - employees acting together to protest terms and conditions of employment
• Providence Christian Academy(Saint Louis), a Classical Christian School in Saint Louis, Missouri.
• Punjab Cricket Association Stadium, Mohali, India
• Put and Call Option Agreement
• Pittsburgh Cricket Association, Pittsburgh,USA