| Acronym | Definition |
|---|
| POS | Positive |
| POS | Point-Of-Sale |
| POS | Parent(s) Over Shoulder (chat) |
| POS | Position (sports statistics) |
| POS | Point-Of-Service |
| POS | Period Of Service |
| POS | Political Science |
| POS | Place of Service |
| POS | Part of Speech |
| POS | Program of Study |
| POS | Pomona (Amtrak station code; Pomona, CA) |
| POS | Philosophy of Science |
| POS | Plan of Study |
| POS | Position of Strength |
| POS | HIV Positive |
| POS | Proof of Solution (various organizations) |
| POS | Person of Suspicion |
| POS | Plan Obligatorio de Salud (Spanish; Colombia) |
| POS | Priority of Support |
| POS | Person on Street (stories) |
| POS | Polycystic Ovary Syndrome |
| POS | Pain of Salvation (band) |
| POS | Planet Of Sound (UK nightclub) |
| POS | Pictures on Site |
| POS | Port Of Seattle |
| POS | Power of Suggestion |
| POS | Plan d'Occupation des Sols (French: Estate Layout Policy) |
| POS | Packet Over SONET |
| POS | Position Played (baseball) |
| POS | Positive Organizational Scholarship |
| POS | Listening Position |
| POS | Professional Office Services (various locations) |
| POS | Poselok (Russian, small town; used in postal addresses) |
| POS | Partially Ordered Set (abstract algebra) |
| POS | Power on Standby (computing) |
| POS | Preliminary Official Statement |
| POS | Project Office Support (various locations) |
| POS | Proof of Service (legal form) |
| POS | Political Opportunity Structure |
| POS | Portable Operating System (computing) |
| POS | Primary Operating System |
| POS | Pit of Saron (World of Warcraft game) |
| POS | PPP Over SONET |
| POS | Psychological Operations Specialist |
| POS | Programmable Option Set |
| POS | Persistent Object Systems |
| POS | Power on Sequence |
| POS | Point of Service |
| POS | Point of Sale |
| POS | Programmable Object Select |
| POS | Power Operating System |
| POS | Position |
| POS | Power on Suspend |
| POS | Packet over Sdh |
| POS | Power on Stopgrant |
| POS | Power on Servicing |
| POS | Personal Operating System |
| POS | Persistent Object Store |
| POS | Portable Operating System |
| POS | Plain Old Stereo |
| POS | Polyorganosiloxane |
| POS | Probability Of Success |
| POS | Partial-Onset Seizure |
| POS | Paperless Office System |
| POS | Polar Orbiting Satellite |
| POS | Public Opinion Strategies |
| POS | Porcelain-On-Steel (cookware) |
| POS | Physician Order Sheet (healthcare) |
| POS | Palm Operating System |
| POS | Public Open Space (UK) |
| POS | Persistent Object Service |
| POS | Polytechnische Oberschule (Germany) |
| POS | Personal Operating Space (IEEE 802.15 TG1) |
| POS | Priory of Sion |
| POS | Peacetime Operating Stock(s) |
| POS | Probability of Survival |
| POS | Policyowner Service (insurance industry) |
| POS | Product of Sums |
| POS | Public Offering Statement (bond financing) |
| POS | Pair with Overall Shield (cabling) |
| POS | Pivoting Optical Servo |
| POS | Plane of Sky (gaming) |
| POS | Piece of Stuff (polite form) |
| POS | Positively Outrageous Service |
| POS | Plane of Symmetry |
| POS | Proof of Shipment |
| POS | Palliative Care Outcome Scale (clinical outcome measurement) |
| POS | Priority One Services (various locations) |
| POS | Plasma Opening Switch |
| POS | Place of Skulls (band) |
| POS | Pacific Orchid Society (Hawaii) |
| POS | Post Oil Solutions (Brattleboro, Vermont) |
| POS | Player Owned Station (Eve-Online MMORPG) |
| POS | Pennsylvania Orthopaedic Society |
| POS | Plane of Storms (gaming) |
| POS | Project Overview Statement |
| POS | PERQ Operating System |
| POS | Prince of Space (movie) |
| POS | Perspectives on Slavistics (linguistic conference) |
| POS | Port Of Spain, Trinidad, Trinidad And Tobago - Piarco International Airport (Airport Code) |
| POS | Phoenix Online Studios |
| POS | Partial Order Schedule |
| POS | Peninsula Orchid Society (San Mateo, CA) |
| POS | Proof of Stock |
| POS | Ports Of Support |
| POS | Parts Only Service (Dell, Inc.) |
| POS | Peacetime Operational State |
| POS | Persistent Object Server |
| POS | Purchase Order Specification (quality assurance) |
| POS | Pacific Oceanographic Synopsis |
| POS | Process Operating Station |
| POS | Prime Orbital System (gaming) |
| POS | Path-Over-SONET (synchronous optical network) |
| POS | Plant Operating Specification |
| POS | Portable Oxygen Subsystem |
| POS | Procedings of Science |
| POS | Purchased Operator Service |
| POS | Process Override Switch |
| POS | Programmable Object/Option Select |
| POS | Pre-Operational Support (US DoD) |