PS

PS or ps may be:

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• Post scriptum (denotes a message appended at the end of a letter after the writer's signature)
• A picosecond, $10^\{-12\}$ of a second
• Pferdestärke (German for horsepower)
• Pashto language (ISO 639 alpha-2)
• Public school (often as part of the number of an unnamed school in the United States, such as P.S. 31.)
• .ps, the Internet country code for the Palestinian territories.
• P.S., a film
• Priory of Sion
• Proton Synchrotron

Devices:

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• polystyrene, the resin identification code
• power supply
• PlayStation

Computer programs:

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• Adobe Photoshop
• PostScript, a page description language.
• ps, an application distributed on Unix and Unix-like operating systems to display running processes.
• Print Shop
• Planetside is an MMOFPS developed and published by Sony Online Entertainment.

Political parties:

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• French Socialist Party
• Socialist Party (francophone Belgium)
• Socialist Party (Portugal)

PS/1

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PS/2

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