| Acronym | Definition |
|---|
| PSD | (Adobe) Photoshop Data file (Extension) |
| PSD | Prevention of Significant Deterioration |
| PSD | Power Spectral Density |
| PSD | Private Sector Development |
| PSD | Photoshop Document |
| PSD | Social Democratic Party (Central African Republic) |
| PSD | Pesticides Safety Directorate (UK) |
| PSD | Partido Social Democrata (Portuguese Social-Democrat Party) |
| PSD | Particle Size Distribution |
| PSD | Parti Social Démocrate (Social Democratic Party, Cape Verde) |
| PSD | Partidului Social Democrat (Romanian) |
| PSD | Payment Services Directive (EU) |
| PSD | Personnel Support Detachment |
| PSD | Position Sensitive Detector |
| PSD | Partido Social Democrãtico (Portugese: Social Democratic Party, Cape Verde) |
| PSD | Public Service Division (Singapore) |
| PSD | Post Source Decay |
| PSD | Post-Synaptic Density (neurobiology) |
| PSD | Personal and Social Development |
| PSD | Postsynaptic Densities |
| PSD | Professional Software Development |
| PSD | Personal Secure Drive |
| PSD | PowerStroke Diesel (Ford Motor Company) |
| PSD | Pennsylvania School for the Deaf |
| PSD | Public Safety Department |
| PSD | Personal Security Detachment |
| PSD | Phase Sensitive Detector (lock-in amplifier) |
| PSD | Partido Socialista Democrático (Social Democratic Party, Brazil) |
| PSD | Power Stroke Diesel (Ford) |
| PSD | Page Setup Dialog (Windows programming) |
| PSD | Power Savings Drive (Hybrid Disc Drive that includes flash memory to reduce drive motor operation) |
| PSD | Pattern Standard Deviation (glaucoma testing) |
| PSD | Photon Stimulated Desorption |
| PSD | Public Security Directorate (Jordan) |
| PSD | Parti Social Démocratique (French: Social Democratic Party) |
| PSD | Personnel Support Activity Detachment (US Navy) |
| PSD | Postal Security Device |
| PSD | Process Shutdown (oil, chemical and process industries) |
| PSD | Protective Security Detail |
| PSD | Programmable System Devices |
| PSD | Protective Services Division |
| PSD | Professional Staff Development |
| PSD | Pediatric Spectrum of HIV Disease |
| PSD | Partia Socialdemokrate (Social Democratic Party, Albania) |
| PSD | Power Sliding Door |
| PSD | Program Support Division (USACE) |
| PSD | Pipeline Systems Division (American Society of Mechanical Engineers) |
| PSD | Pulse Shape Discriminator |
| PSD | Protective Service Detail |
| PSD | Play Sequence Descriptor |
| PSD | Professional Standards Division |
| PSD | Passive Sampling Device(s) |
| PSD | Program Support Data |
| PSD | Printer Sharing Device |
| PSD | Physiological Support Division |
| PSD | Photo Storage Device |
| PSD | Public Service Director |
| PSD | Propulsion Systems Division |
| PSD | Photoshop Deluxe (Adobe bitmap file editor) |
| PSD | Parkway School District (Missouri) |
| PSD | Pennridge School District (Perkasie, Pa) |
| PSD | Prevention of Serious Deterioration |
| PSD | Palisades School District (Kintnersville, Pennsylvania) |
| PSD | Port-Sharing Device |
| PSD | Power Semiconductor Device |
| PSD | Production Shutdown |
| PSD | Petal School District (Petal, Mississippi) |
| PSD | Punch Sport Drink (United States Naval Academy) |
| PSD | Pyramid Systems Development (Cairo, Egypt) |
| PSD | Personnel Service Division |
| PSD | planning systems division (US DoD) |
| PSD | Program for Sustainable Development |
| PSD | Photo Smoke Detector (fire alarm systems) |
| PSD | Port Security Detachment |
| PSD | Product Service Description (Interoperability Elements of Service) |
| PSD | Planned Ship Date |
| PSD | Package Solution Definition |
| PSD | Promotion Service Date |
| PSD | Pressure-Sensitive Digitizer |
| PSD | Packet Switch Design |
| PSD | Program Status Data |
| PSD | Pulse-Shaped Discrimination |
| PSD | Power Systems Demonstrator |
| PSD | Power Supply Drawer |
| PSD | President Security Division (Sri Lanka) |
| PSD | Program Security Directive |
| PSD | Project Support Data |
| PSD | Personnel Service Directorate |
| PSD | Port Safety Detachment (US Coast Guard) |
| PSD | Post Security Detachment |
| PSD | Product System Demonstration |
| PSD | Port Scan Detection/Detector |
| PSD | Polysubstance Dependency |
| PSD | Polystyrene, Deuterated |
| PSD | Printed Strip Dipole |
| PSD | Purchasing Support Directories |