PS

P.S. commonly refers to: PS, P.S., ps, and other variants may also refer to:
 * Postscript, writing added after the main body of a letter

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

Literature

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

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

Language

 * Pashto language (ISO 639 alpha-2 language code "ps")
 * Proto Semitic, a hypothetical proto-language ancestral to historical Semitic languages of the Middle East
 * The sound of the Greek letter psi (Greek) (ψ).

Places

 * Palau (FIPS PUB 10-4 territory code PS)
 * State of Palestine (ISO 3166 country code PS)

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

Units of measurement

 * Petasecond (Ps), 1015 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 PS4−xOx3− (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
 * Pacific Southwest Airlines (1949-1988), IATA designator of former airline
 * Ukraine International Airlines, IATA airline designator since 1992

Other uses

 * iPhrothiya yeSiliva, a South African military award (Postnominal title: PS)
 * MoMA PS1, an art institution in New York
 * Padma Shri, an Indian civilian award
 * Plastic Surgery, abbreviated as P.S. for simple use
 * Police sergeant
 * Power Stage, a World Rally Championship special stage
 * Power Steering, a device that helps with steering vehicles
 * Power supply
 * Professional services, abbreviated P.S. in name suffixes
 * State school or public school, in the US and other countries