| Acronym | Definition |
|---|
| PSS | Personal Social Services (UK) |
| PSS | Poly (Styrene Sulfonic Acid) |
| PSS | Product Support Services (Microsoft) |
| PSS | Physica Status Solidi |
| PSS | Power System Stabilizer |
| PSS | Peak Season Surcharge |
| PSS | Public School System |
| PSS | Progressive Systemic Sclerosis |
| PSS | Porcine Stress Syndrome |
| PSS | Power System Simulator |
| PSS | Pharmaceutical Society of Singapore |
| PSS | Product Service System |
| PSS | Partito Socialista Svizzero (Social Democratic Party Switzerland) |
| PSS | Planning Support Systems |
| PSS | Portosystemic Shunt |
| PSS | Price Stern Sloan (publishing company) |
| PSS | Performance Support System |
| PSS | Plan de Secours Spécialisé (French: Specialized Rescue Plan) |
| PSS | Partida Socialdemocratica de La Svizra (Social Democratic Party Switzerland) |
| PSS | Parti Socialist Suisse (Social Democratic Party, Switzerland) |
| PSS | Passenger Service System |
| PSS | Photographic Society of Singapore |
| PSS | Packet Switched Service (FTS2000) |
| PSS | Personal Safety System |
| PSS | Partito Socialista Sammarinese (San Marino Socialist Party) |
| PSS | Packet Switch Stream |
| PSS | Packet Switching System |
| PSS | Premier Support Services |
| PSS | Pseudo Steady State |
| PSS | Physiologic Saline Solution |
| PSS | Protective Security Service |
| PSS | Programmable Safety System |
| PSS | Presidential Security Service |
| PSS | Phi Sigma Sigma |
| PSS | Physical Security Specialist |
| PSS | Precancel Stamp Society |
| PSS | Production Support Services |
| PSS | Photonic Service Switch |
| PSS | Physical Symbol System Hypothesis (cognitive science) |
| PSS | Public Safety Service |
| PSS | Program Support Staff |
| PSS | Pure Sensory Stroke (medical) |
| PSS | Personnel Service Support |
| PSS | Process Support System |
| PSS | Plant Shift Superintendent |
| PSS | Pacific Stars and Stripes |
| PSS | Protective Security Specialist |
| PSS | Port Skills and Safety Ltd (UK) |
| PSS | Portable Spacecraft Simulator |
| PSS | PlanetStarSiege (gaming) |
| PSS | Protruding Single Strand (genetics) |
| PSS | Perimeter Security System |
| PSS | Portable Solid State |
| PSS | Procedures, Specifications and Standards |
| PSS | Personal Smart Space |
| PSS | Pseudotolithus Senegalensis (aka Cassava Croaker; fisheries) |
| PSS | Pacific Sociological Association |
| PSS | Port Security Specialist |
| PSS | Parental Stress Service, Inc. (Oakland, CA) |
| PSS | Port Safety and Security |
| PSS | Personnel Support System |
| PSS | Portable Surveillance System |
| PSS | Periodic State Saving |
| PSS | Physical Security Survey |
| PSS | Product Service & Support |
| PSS | Plans and Support Section |
| PSS | Portable Security System |
| PSS | Probabilistic Safety Study |
| PSS | Physical Signaling Sublayer |
| PSS | Phase-Switched Screen |
| PSS | Personnel Security Staff |
| PSS | Packeteer Software Subscription |
| PSS | Personnel Staffing Specialist |
| PSS | Persistent Storage Service (Cisco) |
| PSS | Primary Shutdown System |
| PSS | Polar Subsurface Sounder |
| PSS | Propulsion Support System |
| PSS | Programmer Support System |
| PSS | Premature Stage Separation |
| PSS | Pulsed Spallation Source |
| PSS | Pacific South Swell |
| PSS | Programme Spécial pour le SIDA (Special programme on AIDS) |
| PSS | Protective Safety Systems, Inc. (Virginia) |
| PSS | Physical Source Statements |
| PSS | Payload Safing Sequence |
| PSS | Program Systems Service |
| PSS | Passive Sensor System |
| PSS | Program System Support |
| PSS | Primary Shift Selector |
| PSS | Piecewise Stationary Source |
| PSS | Personnel Service Section |
| PSS | Preliminary Screening Set |
| PSS | Possibility of Shortage of Spares |
| PSS | Problem Solving Sheet |
| PSS | Pimpama State School (Gold Coast, Australia) |
| PSS | Peripheral Server Station |
| PSS | Pseudo-Search Scan |
| PSS | Personnel Support Summary |
| PSS | Postal Service Syndrome |
| PSS | Pre-Positioned Strategic Stocks |
| PSS | Performance Standards Sheet |
| PSS | Personnel Systems Section |
| PSS | Production Sonobuoy Specification(s) |
| PSS | Prepared Shelter System |
| PSS | Product Support Symposium |
| PSS | Professional Service Solutions Pty Ltd (Brisbane, Australia) |
| PSS | Philanthropy Support Services Inc. (Virginia) |
| PSS | Pentecost Social Services (Ghana) |
| PSS | Passenger Ship Safety |
| PSS | Project Scope Statement (various companies) |
| PSS | Product Support Specialist (various companies) |
| PSS | Production Scheduling System (various companies) |
| PSS | Partner Self Service |
| PSS | Product Specification Sheet |
| PSS | Portable Shopping System (Symbol Technologies) |
| PSS | Profit Sharing Scheme |
| PSS | Psychosocial Support Services (various locations) |