# PS

P.S. commonly refers to:
PS, P.S., ps, and other variants may also refer to:

## Arts, entertainment and media
### Literature

* PS Publishing, based in the UK
* PS Magazine, a U.S. Army magazine
* Popular Science, a U.S. magazine
* PlayStation Magazine (disambiguation)

### Music

* PS Classics, a record label
* P.S. (album), a compilation album of film music by Goran Bregovic
* P.S. (A Toad Retrospective), a compilation album of music by Toad The Wet Sprocket
* "PS", 2003 song by The Books from the album The Lemon of Pink
* "P.S.", 1993 song by James from the album Laid

### Stage and screen

* P.S. (film), a 2004 film
* P.S., a 2010 film by Yalkin Tuychiev
* PS (TV series), a German television series
* Prompt corner or prompt side, an area of a stage

### Other media

* PlayStation, a video gaming brand owned by Sony
* PlayStation (console), a home video game console by Sony
* Ponniyin Selvan (disambiguation), Indian media franchise, abbreviated PS

## Honors

* iPhrothiya yeSiliva, a South African military award
* Padma Shri, an Indian civilian award

## Language

* Pashto language (ISO 639:ps)
* Proto-Semitic language, a hypothesized proto-language
* The sound of Greek letter psi (ψ)

## Places

* Palau (FIPS PUB 10-4 territory code PS)
* State of Palestine (ISO 3166 country code PS)
* MoMA PS1, an art institution in New York

## Politics

* PS – Political Science & Politics, academic journal
* Parti Socialiste (disambiguation), French
* Partido Socialista (disambiguation), Spanish and Portuguese
* Partito Socialista (disambiguation), Italian
* Polizia di Stato, Italian national police force
* Positive Slovenia
* Pradeshiya Sabha, a unit of local government in Sri Lanka
* Progressive Slovakia Progresívne Slovensko
* Social Democratic Party (Andorra) Partit Socialdemòcrata
* Socialist Party (Netherlands)
* Socialist Party of Albania Partia Socialiste
* Socialist Party of Chile Partido Socialista de Chile
* Socialist Party of Romania Partidul Socialist [din România]
* Finns Party Perussuomalaiset
* Movement of Socialists (Pokret socijalista), a political party in Serbia

## Religion

* Pastors, ministers in some Christian churches
* Psalms, a book in the Tanakh and Christian Bibles

## Science and technology
### Units of measurement

* Petasecond (Ps), 10$^{15}$ seconds
* Picosecond (ps), 10$^{−12}$ seconds
* Pferdestärke (PS), abbreviation of the German term for metric horsepower
* Picosiemens (pS), SI unit of electric conductance

### Computing

* Adobe Photoshop, a graphics editor and creator by Adobe
* MPEG program stream, an MPEG-2 container format
* Parametric Stereo, feature used in digital audio
* PostScript, a page description language
** .ps, filename extension for a file in PostScript format
* ps (Unix), an application that displays statistics on running processes
* .ps, the State of Palestine Internet domain extension or top-level domain (ccTLD)
* PS Power and Sample Size, an interactive computer program for power and sample size calculations
* Windows PowerShell, a command line scripting and system management shell for Microsoft Windows

### Medicine

* Panayiotopoulos syndrome, a childhood seizure disorder
* Progeroid syndromes, a group of rare diseases causing premature aging
* Pulmonary stenosis or pulmonic stenosis, obstruction of the pulmonary artery of the heart

### Physics and chemistry

* P$_s$ or static pressure, in fluid mechanics and aviation
* Proton Synchrotron, a 1959 particle accelerator at CERN
* Chloropicrin, a highly toxic chemical compound
* Phosphatidylserine, a phospholipid
* Phosphorothioate (or thiophosphate), a family of compounds and anions with the general chemical formula PS$_{4−x}$O$_x$$^{3−}$ (x = 0, 1, 2, or 3)
* Polystyrene, a common type of plastic
* Ps, positronium, pseudo-chemical symbol

## Transportation

* Paddle steamer, abbreviated PS in vessel prefixes
* Power Stage, a World Rally Championship special stage
* Power steering, a device that helps with steering vehicles
* Pacific Southwest Airlines (1949-1988), IATA designator of former airline
* Ukraine International Airlines, IATA airline designator since 1992

## Other uses

* Planning Service, Department of the Environment (Northern Ireland)
* Plastic Surgery, abbreviated as P.S. for simple use
* Police sergeant
* Power supply
* Professional services, abbreviated P.S. in name suffixes
* State school or public school, in the US and other countries