| Physical Sciences Division | Academic & Science |
| Platform Screen Doors | Academic & Science |
| Port Said | Airport Code |
| Position Sensing Device | Business |
| Powered Screwdriver Designers | Business |
| Puget Sound Energy, Inc. | Business |
| Psource | Business |
| Pulse Seismic Incorporated | Business |
| Particle Size Distribution | Chemistry |
| Palmdale School District | Community |
| Play Sequence Descriptor | Community |
| Practical Self Defense | Community |
| Personal And Social Development | Community |
| Power Systems Development | Community |
| PA School for the Deaf | Community |
| Pascagoula School District | Community |
| Pennsylvania School for the Deaf | Community |
| Performance Systems Development | Community |
| Poudre School District | Community |
| Peninsula School District | Community |
| Power Spectral Density | Computer and Networking |
| Prevention of Significant Deterioration | Computer Hardware |
| Portable Storage Device | Computer Hardware |
| Photo Shop Data | Computing |
| Photo Shop Development | Computing |
| Package Substrate Defect | Computing |
| Packet Switched Data | Computing |
| Performance Stretching Device | Computing |
| Post Script Driver | Computing |
| Persistent Storage Device | Computing |
| Page Setup Dialog | Computing |
| Protection Switching Duration | Computing |
| Printer Sharing Device | Computing |
| Programmers Supplementary Documents | Computing |
| Position Sensitive Detector | Electronics |
| Pulse Shape Discrimination | Electronics |
| Photoshop Document | File Extensions |
| Adobe Photoshop Format Bitmap Graphics | File Type |
| Periscope Debugger Definition File | File Type |
| Packers and Stockyards Division | General |
| Passing Slowing Distance | General |
| Personal Security Detachment | General |
| Post Strike Damage | General |
| Porsche Sperrdifferential | General |
| Power Sliding Door | General |
| Power Split Device | General |
| Pressure Shutdown | General |
| Pirelli Star Driver | General |
| Passing Sight Distance | General |
| Presence Sensing Device | General |
| Position Sensitive Damping | General |
| Pump Control with Diagnosis | General |
| Panoramic Sliding Roof | General |
| Peugeot Summer Drive | General |
| Proportion of Stopping Distance | General |
| Printing Something Dumb | General |
| Power Stroke Diesel | General |
| Pressure Sensitive Dimensional | General |
| Pseduo Spectral Data | General |
| Police Service Dog | General |
| Phantom Souls Domain | General |
| Pcb Systems Division | General |
| Perturbation Solver For Dynamic | General |
| The Power Supply Dancers | General |
| Pass Support Detachment | General |
| Periodic Spinodal Decomposition | General |
| Personel Security Detail | General |
| Preseizure State Detection | General |
| Please Send Direct | General |
| Profile Structure Definition | General |
| Proportional Stock Density | General |
| Pseudo Single Domain | General |
| Patricia Spencer Design | General |
| Positive Straw Discharge | General |
| Platform Specific Driver | General |
| Payment Services Directive | General |
| Professional Scrum Developer | General |
| Pennsylvania Sumerian Dictionary | General |
| Power Spectral Densities | General |
| Power Spectrum Density | General |
| Production Supply and Distribution | General |
| Public Safety Department | General |
| Police Search and Destroy | Governmental |
| Personal Security Device | Governmental |
| Police Security Dogs | Governmental |
| Promote Sustainable Development | Governmental |
| Professional Standards Department | Governmental |
| Port of San Diego | Governmental |
| Private Sector Development | Governmental |
| Payment Services Division | Governmental |
| Paducah Sun Democrat | Governmental |
| Partidul Social Democrat | Governmental |
| PARSODA | Indian Railway Station |
| Partido Socialista Democrático | International |
| Performance Standards Development | Jobs |
| Professional Sales Development | Jobs |
| Pattern Standard Deviation | Maths |
| Pesticides Safety Directorate | Medical |
| Pre School Disability | Medical |
| Post Stroke Depression | Medical |
| Protein S Deficiency | Medical |
| Pancreas-Sparing Duodenectomy | Medical |
| Patient Services Department | Medical |
| Post School Depression | Medical |
| Pilonidal Sinus Disease | Medical |
| Placental Sulphatase Deficiency | Medical |
| polysystemic dysautonomia | Medical |
| Patient Specific Direction | Medical |
| Posterior Sagittal Diameter | Medical |
| Protein Sequence Database | Medical |
| psychosomatic disease | Medical |
| Personnel Support Detachment | Military and Defence |
| Position Sensing Detector | Military and Defence |
| Post Security Detachment | Military and Defence |
| Product System Demonstration | Military and Defence |
| Personnel Services Division | Military and Defence |
| Planning Systems Division | Military and Defence |
| Personal Security Detail | Military and Defence |
| Programmable System Device | Networking |
| Port Said, Arab Republic of Egypt | Regional |
| Pay Supply Depot | Regional |
| Packaged Software Development | Softwares |
| Program Support Document | Space Science |