| Acronym | Definition |
|---|
| PTI➣Press Trust of India |
| PTI➣Pardon The Interruption |
| PTI➣Parque Tecnologico Itaipu (Portuguese: Itaipu Technological Park; Brazil) |
| PTI➣Power Technologies, Inc. |
| PTI➣Post-Tensioning Institute |
| PTI➣Pre-Trip Inspection (transportation) |
| PTI➣Protection Travailleur Isolé (French: Lone Worker Protection System) |
| PTI➣Piedmont Triad International (airport code) |
| PTI➣Polskiego Towarzystwa Informatycznego (Polish: Polish Information Processing Society) |
| PTI➣Photon Technology International (various locations) |
| PTI➣Power Technologies International (Siemens) |
| PTI➣Power to Innovate (UK) |
| PTI➣Pattern-Triggered Immunity (plant biology) |
| PTI➣Permit To Install |
| PTI➣Pittsburgh Technical Institute (Oakdale, Pennsylvania) |
| PTI➣Public Technology Institute (Washington, DC) |
| PTI➣Portable Test Instrument |
| PTI➣Panel Link Tv-Out Interface |
| PTI➣Payload Type Identifier |
| PTI➣Parallel Technologies Inc. |
| PTI➣Promise Technology Inc. |
| PTI➣Parent Training and Information (various locations) |
| PTI➣Public Transport Interchange (various locations) |
| PTI➣Public Transport Information |
| PTI➣Pretax Income |
| PTI➣Power Training Institute |
| PTI➣Premier Travel Inn (UK) |
| PTI➣Physical Training Instructor |
| PTI➣Palomar Testbed Interferometer (observatory) |
| PTI➣Public Technology, Inc. |
| PTI➣Parallel Technologies Inc |
| PTI➣Pre Trial Intervention |
| PTI➣Previously Taxed Income |
| PTI➣Periodic Technical Inspection (road safety) |
| PTI➣Practice Team Information (UK) |
| PTI➣Play Ten Interactive (interactive entertainment software publisher; Moscow, Russia) |
| PTI➣Police Training Institute |
| PTI➣Proton Therapy Institute (University of Florida, Jacksonville, FL) |
| PTI➣Pollution Tolerance Index |
| PTI➣Pakistan Tehrik-E-Insaaf |
| PTI➣Playmates Toys, Inc. (El Segundo, CA) |
| PTI➣Payment to Income |
| PTI➣Printing Technology Inc (Chatsworth, CA) |
| PTI➣Perpetual Testing Initiative (Portal 2) |
| PTI➣Parent Training Information Center |
| PTI➣Payload Type Indicator |
| PTI➣Packet Type Identifier |
| PTI➣Proof Tracking Index (IEC 60112) |
| PTI➣Physical Therapy International (various locations) |
| PTI➣Penetrating Thoracic Injury |
| PTI➣Parent-Teacher Interview |
| PTI➣Primary Trend Index (Richard Russell coined financial analysis term) |
| PTI➣Profit-Taking Index |
| PTI➣Phoenix Technologies Inc |
| PTI➣Personnel Transaction Identifier |
| PTI➣Puente Terrestre Interoceanico (Spanish: Interoceanic Land Bridge) |
| PTI➣Philadelphia Theatre Initiative (Philadelphia, PA) |
| PTI➣Pressure Time Index |
| PTI➣Proxima Therapeutics Inc. |
| PTI➣Portola Tech International (Cumberland, RI) |
| PTI➣Penn Telecom, Inc. (Pennsylvania) |
| PTI➣Public Training Institute |
| PTI➣Public Trust Initiative (US National Institutes of Health) |
| PTI➣Programmable Transport Interface |
| PTI➣Platform Train Interface (London Underground) |
| PTI➣Power Tool Institute, Inc. |
| PTI➣Para Tu Información |
| PTI➣Presidential Technology Initiative |
| PTI➣Planning Time Index |
| PTI➣Programmed Test Input |
| PTI➣Pharmaceutical Technologies International, Inc |
| PTI➣Pacific Telesis International |
| PTI➣Protection Technology Idaho (contractor, INEL) |
| PTI➣Path Trace Identifier (SDH or Sonet Technology) |
| PTI➣Psychotherapists Training Institute (Milford, MA) |
| PTI➣Payroll Transfers Inc |
| PTI➣Positive Target Identification (airline security) |
| PTI➣Previously Tax Income |
| PTI➣Parallel Telemetry Interface (Lucent) |
| PTI➣Proposed Technical Improvement |
| PTI➣Particulate Trap Inlet |
| PTI➣Performance Test Instructions (Agilent) |
| PTI➣Pyron Technologies, Inc. |
| PTI➣Post Tenancy Inspection (UK) |