| Acronym | Definition |
|---|
| PID | Packet Identifier |
| PID | Project Information Document |
| PID | Process Identifier |
| PID | Proportional-Integral-Derivative (controller) |
| PID | Process Identification |
| PID | Pelvic Inflammatory Disease |
| PID | Public Improvement District |
| PID | Process Identification Number |
| PID | Project Initiation Document |
| PID | Parameter Identification |
| PID | Personal Identification |
| PID | Personally-Identifiable Data |
| PID | Particle Identification (Nuclear and Particle Physics) |
| PID | Parcel Identification (property registration) |
| PID | Political Intelligence Department (UK) |
| PID | Proportional, Integral, Derivative (process control, programmable logic controllers) |
| PID | Product Identification |
| PID | Photo Ionization Detector |
| PID | Passive Infrared Detector |
| PID | Photoionization Detector |
| PID | Patient Identifier (alphanumeric and bar code) |
| PID | Pathway Interaction Database (cancer research) |
| PID | Proportional-Integral-Derivative Control (Instrumentation process control) |
| PID | Program Information Document (various organizations) |
| PID | Product Item Description |
| PID | Physical Id |
| PID | Protocol Id |
| PID | Product Id |
| PID | Player Id |
| PID | Personal Id |
| PID | Persistent Identifier |
| PID | Packet Id |
| PID | Provider Identifier |
| PID | Proportional Integrator Derivator |
| PID | Parallel Independent Decoding |
| PID | Public Id |
| PID | Process Id |
| PID | Protection Id |
| PID | Proportional Integral Differential |
| PID | Past International Director |
| PID | Protocol Identification |
| PID | Passenger Information Display (software; transportation industry) |
| PID | Program Identifier |
| PID | Property Income Distribution (various locations) |
| PID | Pennsylvania Insurance Department |
| PID | Nassau, Bahamas - Paradise Island (Airport Code) |
| PID | Positive Identification |
| PID | Proportional, Integral, Differential |
| PID | Project Identification |
| PID | Principal Ideal Domain |
| PID | Paul Is Dead (Paul McCartney urban legend) |
| PID | Public Information Display |
| PID | Press Information Department (Pakistan) |
| PID | Person Identifiable Data (formerly Patient Identifiable Data; UK National Health Service) |
| PID | Protist Image Data |
| PID | Primary Immunodeficiency Disease |
| PID | Personal Identifying Data (various organizations) |
| PID | Plan Identification |
| PID | Purchase Item Description |
| PID | Personal Interior Design (Stockholm, NY) |
| PID | Planned Industrial Development |
| PID | Parent Identification |
| PID | Process-Induced Defect |
| PID | Partial Initial Decision |
| PID | Pre-Injury Duties (workplace rehabilitation) |
| PID | Project Identification Document |
| PID | Projected Image Digital (London, UK) |
| PID | Partido Institucional Democratico (México, politcal party) |
| PID | Prolapsed Intervertebral Disc |
| PID | Process Industries Division (American Society of Mechanical Engineers) |
| PID | Premises Identification (Alberta, Canada Agriculture and Rural Development program) |
| PID | Plan Identifier |
| PID | Poisons Information Database |
| PID | Piping & Instrumentation Diagram |
| PID | Plan Identification number |
| PID | Procurement Item Description |
| PID | Password Identifier |
| PID | Personnel Increment Number |
| PID | Proportional Integrator Differentiator |
| PID | Protocol Identifier Data |
| PID | Programmable Interrupt Device |
| PID | Process & Instrumentation Diagram (also seen as P&ID) |
| PID | Process Identification Document |
| PID | Prime Item Development |
| PID | Proprietary Information Disclosure |
| PID | Procurement Initiation Document |
| PID | Primary Input Device |
| PID | Program Introduction Document |
| PID | Paradise In Distress (Golden Earring album) |
| PID | Process Instrument Diagram |
| PID | Project Information Database |
| PID | Procurement Identification Description |
| PID | Program Integration Directorate |
| PID | Program Implementation Document |
| PID | Plan Identification Designator |
| PID | Precursor Ion Discovery (mass spectrometry) |
| PID | Programmable Interface Device |
| PID | Portable Inspection Device |
| PID | Program Implementation Directive |
| PID | Planned Imaging Data |
| PID | Pre-flight Inserted Data (US Navy S-3 and P-3 aircraft) |
| PID | Plant and Instrumentation Drawing |