| Acronym | Definition |
|---|
| PSA | Professional Services Automation |
| PSA | Prostate-Specific Antigen (test) |
| PSA | Public Service Announcement |
| PSA | Pacific Southwest Airlines |
| PSA | Pressure Sensitive Adhesive |
| PSA | Psoriatic Arthritis |
| PSA | Public Service Agreement (UK government) |
| PSA | Professional Skaters Association (Rochester, MN, USA) |
| PSA | Political Studies Association |
| PSA | Production Sharing Agreement |
| PSA | Photographic Society of America |
| PSA | Pharmaceutical Society of Australia |
| PSA | Public Service Association (New Zealand) |
| PSA | Philosophy of Science Association |
| PSA | Probabilistic Safety Assessment |
| PSA | Plesk Server Administrator (SWsoft) |
| PSA | Particle-Size Analysis (Comparative grain size of soil, stone, and other building materials) |
| PSA | Passenger Shipping Association (UK shipping) |
| PSA | Public Securities Association |
| PSA | Plataforma Solar de Almeria (Spain) |
| PSA | Professional Squash Association |
| PSA | Petroleum Safety Authority (Norway) |
| PSA | Professional Services Agreement |
| PSA | Problem Statement Analyzer |
| PSA | Poultry Science Association |
| PSA | Port of Singapore Authority |
| PSA | Pastel Society of America |
| PSA | Police Service Area |
| PSA | Polysialic Acid |
| PSA | Personal Satellite Assistant |
| PSA | Purchase and Sale Agreement |
| PSA | Poetry Society of America |
| PSA | Police Service Area (Washington, DC) |
| PSA | Probabilistic Safety Analysis |
| PSA | Pakistani Students Association |
| PSA | Personal Service Agentur (Deutsche Telekom inhouse employment agency) |
| PSA | Planning and Service Area |
| PSA | Pooling and Servicing Agreement |
| PSA | Pacific Science Association |
| PSA | Protection Suisse des Animaux |
| PSA | Production-Sharing Contract |
| PSA | Philmont Staff Association |
| PSA | Post Shakedown Availability (US Navy) |
| PSA | Pretrial Services Agency |
| PSA | Protective Services for Adults |
| PSA | Phycological Society of America |
| PSA | Partido Socialista de Andalucía (Socialist Party of Andalucia, Spain) |
| PSA | Physician Scarcity Area |
| PSA | Pressure Swing Absorption |
| PSA | Public Service Advertisement |
| PSA | Public Sector Agreement |
| PSA | Protein Sequence Analysis |
| PSA | Property Services Agency |
| PSA | polar surface area |
| PSA | Progressive Student Alliance |
| PSA | Please See Attached (email threads) |
| PSA | Property Settlement Agreement |
| PSA | Pseudoaneurysm |
| PSA | Professional Staff Association (Maricopa County, AZ community college system) |
| PSA | Power Supply Adapter |
| PSA | Peugeot Société Anonyme (French company/manufacturer of Peugeot and Citroen vehicles) |
| PSA | Public Services Association |
| PSA | Preliminary Site Assessment (environmental consulting) |
| PSA | Principal Staff Assistant (OSD) |
| PSA | Persistent Staging Area (SAP Business Intelligence) |
| PSA | Protein Specific Antigen |
| PSA | Partido Socialista Auténtico (Authentic Socialist Party, Argentina) |
| PSA | Power System Analysis |
| PSA | Product Sharing Agreement |
| PSA | Personnel Support Activity |
| PSA | Protective Security Advisor |
| PSA | Potentiometric Stripping Analysis |
| PSA | Power Supply Agreement |
| PSA | Port Support Activity |
| PSA | Public Speaking Anxiety |
| PSA | Psychology Students' Association |
| PSA | Protezione Svizzera degli Animali |
| PSA | Parcel Shippers Association |
| PSA | Puget Soundkeeper Alliance |
| PSA | Professional Service Association |
| PSA | Precision Strike Association |
| PSA | Programme on Space Applications (UN) |
| PSA | Pilot Symbol Assisted |
| PSA | Protection Sports Association |
| PSA | Pressure Swing Adsorber |
| PSA | Pacing System Analyzer |
| PSA | Pleasant Sunday Afternoon (UK rugby club) |
| PSA | Purchased Service(s) Agreement |
| PSA | Principal Scientific Advisor |
| PSA | Philippine Statistical Association |
| PSA | PolySubstance Abuse |
| PSA | Presbyterian Student Association |
| PSA | Personal Service Assistant |
| PSA | Prepayment Standard Assumption |
| PSA | Pisa, Italy - G Galilei (Airport Code) |
| PSA | Programmable Services Architecture (Nortel) |
| PSA | Pooled Separate Account (IRS Form 5500) |
| PSA | Pennsylvania Society of Anesthesiologists |
| PSA | Potter Slash Archive (fanfiction) |
| PSA | Phoenix Shooters Association (UK, target shooting) |
| PSA | Philippine Society of Anesthesiologists |
| PSA | Packet Switching ASIC (Cisco) |
| PSA | Project Support Agreement |
| PSA | Princeton Soccer Association (Princeton, NJ) |
| PSA | Punjabi Students Association (Pakistan) |
| PSA | Product-Specific Attribute |
| PSA | Per Store Average |
| PSA | Phase Shift Analysis |
| PSA | Procedures & Standards Administration (of ANSI) |
| PSA | Public Service Ambassador |
| PSA | Plant Systems Audit (USDA) |
| PSA | Portable Sanitation Association International |
| PSA | Province Senior Advisor (Vietnam) |
| PSA | Program Support Agreement |
| PSA | Provisional Site Acceptance |
| PSA | President's Scout Award |
| PSA | Pharmacy Service Associate |
| PSA | Passenger Services Act of 1886 |
| PSA | Pay Systems of America (payroll processing company) |
| PSA | Policyholder Surplus Accounts (insurance industry) |
| PSA | Pension Security Act (of 2003) |
| PSA | Pot Smokers of America |
| PSA | Provisional System Acceptance |
| PSA | Proxy Signalling Agent |
| PSA | Power Supplied to the Antenna |
| PSA | Polarizer-Sample-Analyzer |
| PSA | Public Safety Activity (VRE) |
| PSA | Pakistan Scrabble Association |
| PSA | Pulse Shaping Amplifier |
| PSA | Personal Sound Architecture |
| PSA | Pakistan Society of Anaesthesiologists |
| PSA | Port of Singapore Association |
| PSA | Path Signature Analysis |
| PSA | Pre-Sunrise Authorization (for AM radio stations) |
| PSA | Professional Speakers Association of Europe |
| PSA | Printer Subassembly |
| PSA | Pseudo Stuck-At (Fault) |
| PSA | Protocol Specific Annex (Winsock 2) |
| PSA | Power Section Assembly |
| PSA | Print Service Appliance |
| PSA | Pleomorphic Salivary Gland Adenoma |
| PSA | Private Security Account |
| PSA | Pelican Sailing Association |
| PSA | Patrol Services Area |
| PSA | Provisions Storage Assemblies |
| PSA | Platform Services Agreement |
| PSA | Provision Stowage Assembly |
| PSA | Predictive Support Awareness |
| PSA | Production Support Application (SAP) |
| PSA | Pedestrian Safety Assessment |
| PSA | Premier School Agendas, Inc. |
| PSA | Pre-Solicitation Agreement |
| PSA | Portsmouth Soccer Association |
| PSA | Presidential Support Aircraft |
| PSA | Personnel Status Accounting |
| PSA | Publishing Support Assistant |
| PSA | Premier School Agendas Ltd (Canada) |
| PSA | Personal Salon Assistant |
| PSA | Project Support Agency |
| PSA | Perfect Slot Allocation |
| PSA | Packaging Safety Assessment |
| PSA | Planar Spaced Array |
| PSA | Pulse Stream Arithmetic |
| PSA | Pushdown Stack Automation |
| PSA | Performance Specification Acquisition |
| PSA | Procedural Status Attribute |
| PSA | Professional Sports Authenticators/Authentication |
| PSA | Prolate Spheroidal Antenna |
| PSA | PSYOPS Support Activity |
| PSA | Prohibit Signaling Address (Bellcore) |
| PSA | Protection Switch Activated (Alcatel) |
| PSA | Phytochemical Society of Asia |
| PSA | Previous Service Agreement |
| PSA | Proposición Subordinada Adjetiva (Spanish grammar) |
| PSA | Prabhu Dasi Sisters of Ajmeer |