| Photon Detection Efficiency | Academic & Science |
| Project Development Engineer | Academic & Science |
| Propagation Delay Estimation | Academic & Science |
| Paddle Drive Electronics | Academic & Science |
| Predictive Density Estimation | Academic & Science |
| Pengolahan Data Elektronik (Indonesian: Electronic Data Processing) | Academic & Science |
| Product Development Engineer | Academic & Science |
| Probability Density Estimation (physics) | Academic & Science |
| Pulse Detonation Engine | Academic & Science |
| Plataforma en Defensa de l'Ebre (Catalan: Platform for the Defence of the River Ebre) | Academic & Science |
| Paint Design Engineering | Academic & Science |
| Pandie Pandie | Airport Code |
| Purely Domestic Enterprise (finance) | Business |
| Process Development Engineer | Business |
| Panama Diamond Exchange (Panama City, Panama) | Business |
| Paramount Digital Entertainment | Business |
| Product Data Exchange | Business |
| Pride International, Inc. | Business |
| Pacific Design Engineering | Business |
| Pulsed Detonation Engine | Business |
| Personal Development Education | Community |
| Provincial Department of Education | Community |
| Paul Dresher Ensemble | Community |
| Personal Development E | Community |
| Plug in Development Environment | Community |
| Performance Driving Education | Community |
| Processing Development Environment | Community |
| PA Department of Education | Community |
| Professional Development Education | Community |
| Position Determining Entity | Computer and Networking |
| Primary Designated Engineer (UL) | Computer and Networking |
| Print Data Exchange | Computing |
| Processing Development Environment (software) | Computing |
| Personal Digital Entertainment | Computing |
| Position Determination Entity | Computing |
| Personal Developer's Edition | Computing |
| Personal Distributed Environment | Computing |
| Page Directory Entry | Computing |
| Portable Device Enumerator | Computing |
| Parallel database extensions | Computing |
| Preliminary Determination of Epicenter | Earth Science |
| Pseudo Death Experience | General |
| Porsche Driving Experience | General |
| Porsche Design Edition | General |
| Pre Driver Evaluation | General |
| Pumpe Duse Einheit | General |
| Power Distribution Equipment | General |
| Proc Dir Entry | General |
| Pacific Driver Education | General |
| Project Dive Exploration | General |
| Print Dialog Extension | General |
| Public Display of Erection | General |
| Partial Differential Equations | General |
| Preliminary Determination of Epicenters | General |
| Puppy Dog Eyed | General |
| Probability Density Estimation | General |
| phosphodiesterase demektir EN | General |
| Primary Developmental Education (US Air Force) | Governmental |
| Projected Operational Environment | Governmental |
| Permission Display Engine | Governmental |
| Planning, Decision, and Execution | Governmental |
| Pennsylvania Department of Education | Governmental |
| Permitted Daily Exposure | Governmental |
| PINDRAI | Indian Railway Station |
| Partial Differential Equation | Maths |
| Pyridoxine-Dependent Epilepsy | Medical |
| Philadelphia Drug Exchange | Medical |
| Phi Delta Epsilon (medical fraternity) | Medical |
| Psychoacoustic Detail Error | Medical |
| Pug Dog Encephalitis | Medical |
| Phosphodiesterase | Medical |
| Paroxysmal Dyspnea on Exertion | Medical |
| Preliminary Data Element | Military and Defence |
| Possible Duplicate Emission | Physics Related |
| Pandie Pandie, South Australia, Australia | Regional |
| Present Day English | Regional |
| Professional Designation Examination | Regional |
| Program Development Environment | Softwares |
| Platform Development Environment | Softwares |
| Project Dive Exploration (Divers Alert Network) | Sports |
