P.S. commonly refers to:
- Postscript, writing added after the main body of a letter
PS, P.S., ps, and other variants may also refer to:
Arts and entertainment
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
Other media
- PlayStation, a video gaming brand owned by Sony
- PlayStation (console), a home video game console by Sony
- P.S. (film), a 2004 film
- P.S., a 2010 film by Yalkin Tuychiev
- PS Publishing, based in the UK.
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
- Positive Slovenia
- Pradeshiya Sabha, a unit of local government in Sri Lanka
- Progressive Slovakia
- Social Democratic Party (Andorra) Partit Socialdemòcrata
- Socialist Party of Albania Partia Socialiste
- Socialist Party of Chile Partido Socialista de Chile
- Socialist Party of Romania Partidul Socialist [din România]
- True Finns Perussuomalaiset
Religion
Science and technology
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
- Ps 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
- PS, the chemical formula for the sulfanylidenephosphanide molecule
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
- Padma Shri, an Indian civilian award
- iPhrothiya yeSiliva, a South African military award
- Police sergeant
- Power Stage, a World Rally Championship special stage
- Professional services, abbreviated P.S. in name suffixes
- Plastic Surgery, abbreviated as P.S. for simple use
- Public school, a state school in the USA and other countries
See also
- P.S. I Love You (disambiguation)
- PSS (disambiguation)