PS

PS or ps may stand for:

• A picosecond, an SI unit of time equal to 10^-12 of a second.
• Pferdestärke — German for horsepower
• Pashto language (ISO 639 alpha-2, ps)
• Proton Synchrotron, see also:
  • Super Proton Synchrotron
  • Synchrotron
• Public school in the United States, often as part of the number of an unnamed school, such as P.S. 31.
• Priory of Sion

Computing

• postscript (most commonly), a portion of a letter labelled P.S. added after the main body of the letter was written. It stands for post scriptum, a Latin expression meaning "after writing".
• power supply
• ps is an application distributed on Unix and Unix-like operating systems to display running processes.
• P.S., a 2004 film

Objects/products

• PlayStation
• Adobe Photoshop
• Print Shop
• polystyrene, the resin identification code
• Planetside is an MMOFPS developed and published by Sony Online Entertainment.

People

• Peter Salcher, physicist who pioneered ultrafast photography. His most famous work is that about shock waves, photographs of bullet etc.

Actors

• Paul Scofield, an English actor who was born in Sussex.
• Peter Sellers, was a British comedian, talented comic actor, and performer.
• Paul Shaffer, is a Canadian musician, comedian and composer.
• Pauly Shore, an American comedian known for his vivid portrayals of American youth culture.
• Paul Simon, a renowned Jewish American songwriter.
• Penny Singleton, was a Hollywood actress best known for her role in the series of motion pictures based on the comic strip Blondie.
• Pamela Stephenson, is a New Zealand born, naturalized Australian actor, psychologist, and former comedienne.
• Patrick Stewart, is a British film and television actor best known for his roles in Shakespearean and science fiction (e.g., Star Trek) productions.
• Peter Stormare, is a Swedish-born film actor.
• Patrick Swayze, is a dancer, actor and singer, memorable for his roles in the films Dirty Dancing (1987) and Ghost (1990).

Politics

• Political science
• Parti Socialiste, the French Socialist Party
• Parti Socialiste, a Belgian Socialist Party
• Partido Socialista, the Portuguese Socialist Party