| Project Inspection Department | Academic & Science |
| Process and Instrumentation Drawing | Academic & Science |
| Project Implementation Division | Business |
| Products, Innovation, Design | Business |
| Pre Injury Duties | Business |
| Painted Internal Diameter | Business |
| Process Identification Document | Business |
| Plant Industries Division | Business |
| Process Innovation Deployment | Business |
| Program Integration Directorate | Business |
| Prime Item Development | Business |
| Product Installation Diagram | Business |
| Photo Ionization Detector | Chemistry |
| Partners In Development | Community |
| Press Information Department | Community |
| Profound Intellectual Disability | Community |
| Planned Industrial District | Community |
| Protocol ID | Computer and Networking |
| Physical Interface Device | Computer Hardware |
| Packet Identifier Digital | Computer Hardware |
| Pathway Interaction Database | Computing |
| Person Identification Database | Computing |
| Product IDentifier | Computing |
| Product Id | Computing |
| Public Id | Computing |
| Personal Id | Computing |
| Packet Id | Computing |
| Protection Id | Computing |
| Proportional Integrator Derivator | Computing |
| Programmable Interrupt Device | Computing |
| Persistent Identifier | Computing |
| Player Id | Computing |
| Physical Id | Computing |
| Provider Identifier | Computing |
| Parallel Independent Decoding | Computing |
| Personal Identity Digit | Computing |
| PIDAO | Cryptocurrency |
| Process Id File (unix) | File Type |
| Project Information Document | General |
| Positioning Indicating Device | General |
| Programmed Integrated Device | General |
| Proportional Integral and Derivate | General |
| Proportional Intergral Derivative | General |
| Proportional Integral and Derivative | General |
| Property Income Distribution | General |
| Public Interest Design | General |
| Potential Induced Degradation | General |
| Photo Ionization Detection | General |
| Public Improvement Districts | General |
| Proportional Integral Differential | General |
| Public Interest Disclosure | General |
| Property Improvement District | General |
| Personal Infotainment Device | General |
| Parameter Id | General |
| Performance Information Data | General |
| Porsche Innodrive | General |
| Passenger Information Display | General |
| Plastics Information Direct | General |
| Ports Is Deficient | General |
| Past International Director | General |
| Poor Innocent Dragon | General |
| Personal Injury Defense | Governmental |
| Proprietary Information Disclosure | Governmental |
| PIPARDI | Indian Railway Station |
| Proportional-Integral-Derivative | Information Technology |
| Process ID | Information Technology |
| Partido Institucional Democrático | International |
| Principal Ideal Domain | Maths |
| Primary immunodeficiency diseases | Medical |
| Prolapsed Intervertebral Disc | Medical |
| Pain Intensity Differences | Medical |
| patient identification | Medical |
| patient identifier | Medical |
| Person Identifiable Data | Medical |
| Personally Identifiable Data | Medical |
| Primary Immune Deficiency | Medical |
| Proliferative Intraocular Disorder | Medical |
| Primary immune deficiencies | Medical |
| Primary Immunodeficiency Disease | Medical |
| Poughkeepsie Inflamatory Disease | Medical |
| Pelvic inflammatory disease | Medical |
| Plan Identification Number | Military and Defence |
| Positive Identification | Military and Defence |
| Parameter Identication Data | Physics Related |
| Nassau Paradise Island, Bahamas | Regional |
| Project Initiation Document | Softwares |
| Process Identifier | Softwares |
| Parameter Identification | Space Science |
| Payload Insertion Device | Space Science |
| Program Information Document | Space Science |
| Product Identity | Stock Exchange |