| Acronym | Definition |
|---|
| PST | Pacific Standard Time (GMT-0800) |
| PST | Personal Folder Storage (file extension; Microsoft Outlook) |
| PST | Provincial Sales Tax |
| PST | Petroleum Storage Tank |
| PST | Personal Solar Telescope (Hydrogen Alpha Telescope, Coronado filters) |
| PST | Pass Time |
| PST | Pre-Service Teacher |
| PST | Planescape Torment (gaming) |
| PST | Primary State (DSC) |
| PST | Pressure Sensitive Tape |
| PST | Pre-Service Training |
| PST | Please Send Tell (game) |
| PST | Pakistan Standard Time (GMT+0500) |
| PST | Personal Survival Techniques (STCW course) |
| PST | Pulsed Signal Therapy |
| PST | Potassium Sensitivity Test |
| PST | Product Support Tool |
| PST | Physical Screening Test (US Navy) |
| PST | Processing State |
| PST | Product Support Team |
| PST | Psychosexual Therapy |
| PST | Photoshop Tennis |
| PST | Problem Solving Technique |
| PST | Plan Santé Travail |
| PST | Partido Socialista de Timor (Socialist Party of Timor, East Timor) |
| PST | Lead Scandium Tantalate |
| PST | Pre-Structured Technology (Open Software Foundation) |
| PST | Public Safety Telecommunicator |
| PST | Pacific Strike Team (US Coast Guard) |
| PST | Personal Information Store (Microsoft Office) |
| PST | Phase Shifting Transformer |
| PST | Philippine Standard Time (time zone; aka Philippine Time; also seen as PHT) |
| PST | Police Service Technician |
| PST | Plasma Separator Tube |
| PST | Professional Studies and Training |
| PST | Politiets Sikkerhets Tjeneste (Norway) |
| PST | Pagan Standard Time |
| PST | Philadelphia Suburban Transportation |
| PST | Pôle Scientifique et Technologique (French: Science and Technology Center; various locations) |
| PST | Project Support Team, Inc. |
| PST | Public Sector Team |
| PST | Princeton Summer Theater (New Jersey) |
| PST | Perfect Square Trinomial |
| PST | Primary Settling Tank (wastewater treatment) |
| PST | Portuguese Summer Time |
| PST | Post Stall Technology |
| PST | Puget Sound Technology |
| PST | Public Service Trust (UK) |
| PST | Portland Sunday Telegram |
| PST | Pastor Search Team |
| PST | Primordial Soup Theory (evolution) |
| PST | Petroleum Software Technologies |
| PST | Point Source Transmission |
| PST | Police Search Team (UK) |
| PST | Passport Support Tool (Microsoft) |
| PST | Pattern Suggestion Table |
| PST | Physical Simulation Team |
| PST | Planetary Spectroscopy Telescope |
| PST | Priority Selection Table |
| PST | Print Simulation Tester |
| PST | Process Systems Team |
| PST | PIID (Practice Implementation Indicator Description) and SCAMPI (Standard CMMI Assessment Method for Process Improvement) |
| PST | Partial Sciatic Transection |
| PST | Prescribed Sea Time (Navy) |
| PST | Positive Smoke Test |
| PST | Purdue School of Technology |
| PST | Public Service Technician |
| PST | Primary Search Tonal |
| PST | Personnel Subsystem Team |
| PST | Prototype System Test |
| PST | Paired Select Ternary |
| PST | Production Surveillance Test |
| PST | Protective System Technologies (NIJ) |
| PST | Product Segment Team |
| PST | Preliminary Service Testing |
| PST | Pilot Symbol Transmission |
| PST | Processing Services and Technology |
| PST | Pension and Savings Trust |
| PST | Promoter-Proximal Sequence Tag |
| PST | Power School of Technology (Philippines) |
| PST | Production Screen Test (drilling mud conditioning) |
| PST | Polymeric Stabilization |
| PST | Problem Solving Test (McKinsey) |
| PST | Plum Street Temple (Cincinnati, OH) |
| PST | Primary, Secondary and Tertiary |
| PST | Pro Stock Truck (racing) |
| PST | Packet Switching Technology (digital networking communications) |
| PST | Pupil Services Team (various locations) |
| PST | Phoenix Sports Ticket (sports handicapping) |