| Acronym | Definition |
|---|
| PPI | Producer Price Index |
| PPI | Pixels Per Inch |
| PPI | Progressive Policy Institute |
| PPI | Payment Protection Insurance (UK) |
| PPI | Proton Pump Inhibitor (heartburn medication) |
| PPI | Public Policy Institute (AARP) |
| PPI | Pulp and Paper Industry |
| PPi | Pyrophosphate (inorganic chemistry) |
| PPI | Plastics Pipe Institute |
| PPI | Protein-Protein Interactions |
| PPI | Potash & Phosphate Institute |
| PPI | Private Participation in Infrastructure |
| PPI | Parallel Port Interface |
| PPI | Plan Position Indicator (radar) |
| PPI | Programmable Peripheral Interface |
| PPI | Planetary Plasma Interactions |
| PPI | Pensions Policy Institute |
| PPI | Production Price Index (South Africa) |
| PPI | Partito Popolare Italiano (Italian Popular Party) |
| PPI | Public-Private Infrastructure |
| PPI | Pages Per Inch |
| PPI | Pollution Prevention Institute |
| PPI | Patient Package Insert (pharmacies) |
| PPI | Protected Personal Information (privacy regulations and policies FERPA, HIPPA, GLBA) |
| PPI | Past Performance Information |
| PPI | Precision Parts International, LLC |
| PPI | Practical Process Improvement |
| PPI | Primarily Primates Inc (San Antonio, Texas) |
| PPI | Personal Property Inventory |
| PPI | Planning Perspectives, Inc. |
| PPI | Property Price Index |
| PPI | Portion Pac, Inc. |
| PPI | Planned Position Indicator |
| PPI | Proposal Preparation Instructions |
| PPI | Policy Proof of Interest (insurance) |
| PPI | Preprimary Impaired |
| PPI | Private Property Impound (law enforcement) |
| PPI | Pyrograf Products Inc. (Cedarville, OH) |
| PPI | Programmable Parallel Interface |
| PPI | Printed Postage Impressions |
| PPI | Peak Program Indicator |
| PPI | Personal Protection Index (hazard identification) |
| PPI | Parts Per Inch |
| PPI | Polyphthalamide (Amodel, Allegheny Plastics, Inc.) |
| PPI | Personal Priesthood Interview (used in Church of Jesus Christ of Latter-Day Saints) |
| PPI | Post Partum Interval |
| PPI | Pickle Packers International, Inc |
| PPI | Preplanned Product Improvement |
| PPI | POM Preparation Instructions |
| PPI | Paper and Pencil Test |
| PPI | Personnel Process Improvement (US Army) |
| PPI | Potato Products of Idaho |
| PPI | Primary Program Institution |
| PPI | People to People International |
| PPI | Predicted Point of Impact (airdrop mission computer) |
| PPI | Process Prove-In |
| PPI | Power Paragon, Inc. |
| PPI | Prakken Publications, Inc |
| PPI | PCS-to-PCS Interference |
| PPI | Pastoralpsychologische Institut in Schleswig-Holstein und Hamburg eV |
| PPI | Procurement Package Input |
| PPI | Personnel Point of Impact (military paradrop) |
| PPI | Product Performance Issue |
| PPI | Processor to Processor Interface |
| PPI | Premier Property Inspections |
| PPI | PRIMEX Physics International |
| PPI | Payroll Personnel Information |
| PPI | Petropars Iran |
| PPI | Preservation & Packing Instructions |
| PPI | PIPA Pulse Integrator |
| PPI | Provide Physical Infrastructure |
| PPI | Primary Power Interface (NASA EHF communications) |
| PPI | Production Programming Instruction |
| PPI | Prudential Plans, Incorporated |
| PPI | Primarly Primates Inc (San Antonio, Texas) |
| PPI | Pre-Production Implementation |
| PPI | Project Planning & Initiation |
| PPI | Personal Products Index |
| PPI | Principia Publishing Incorporated |
| PPI | Primary Plant Instrumentation |
| PPI | Plan Preparation Instruction |