PSD

PSD can stand for:

Politics

PSDs stand for Private Safety Details

• Social Democratic Party, a political party of Portugal.
• Social Democratic Party, a political party of Romania.
• Socialist Destourian Party, the old name (to 1988) of the ruling party in Tunisia, currently called Constitutional Democratic Rally.

Sciences

• Particle size distribution, in many branches of science and technology.
• Phase sensitive detector, in electronics.
• Position sensitive device or position sensitive detector, a device that measures the one or two-dimensional position of a lightspot.
• Positive-semidefiniteness as it relates to matrices.
• Postsynaptic density, a specialization of the cytoskeleton at the synaptic junction.
• Post Source Decay, a technique used in MALDI mass spectrometry.
• Power spectral density is the power of a signal per some unit of measurement such as temporal or spatial frequency used in signal analysis.
• Prevention of significant deterioration, an American environmental program created under the Clean Air Act designed to maintain existing air quality in areas already meeting EPA National Ambient Air Quality Standards.

Computers

• .psd (Photoshop document), the default file extension of the proprietary file format of Adobe System's Photoshop program.
• A portable or personal storage device, small hard drives designed to copy digital photographs from your camera.
• Programmable system device, an integrated circuit manufactured by ST Microelectronics and including Flash-ROM, RAM, and logic functions on a single chip.
• A Program Structure Diagram, also known as a Nassi-Shneiderman diagram.
• Power Supply Disturbance, a fault model for embedded systems and SoCs
• position sensing detecter

Medicine

• Post-traumatic stress disorder, though "PTSD" is more common.

Business

• Product Support & Development,
• Product Support Department

Others

• Pro Sports Daily, a popular sports website.
• Program Service Data, also known as Program Associated Data, usually data sent along with an HD radio program.
• Personal Security Detail, the name given to a group of private security contractors tasked with protecting a client.
• Platform screen doors, platform-edge doors used on railway platforms.
• Punch Sport Drink, a drink served to Midshipmen at the United States Naval Academy
• Pennsylvania Sumerian Dictionary, University of Pennsylvania's project to create an online dictionary of the first language.
• Psychiatric service dog, a specific type of assistance dog that helps people with psychiatric disabilities.
• Power Split Device, part of the Hybrid Synergy Drive on a Toyota Prius.
• Ford Power Stroke engine, the Ford turbo diesel engine available in the F250 / F350 line as well as other trucks.
• Philippine School Doha, one of the Philippine Schools in Doha.