PSM, an acronym, may stand for the following:
In organizations:
- Pakistan School Muscat, a Pakistani Co-educational institute in Oman
- Palestine Solidarity Movement, a student organization in the United States
- Panhellenic Socialist Movement, a centre-left party in Greece
- Parti Sosialis Malaysia, a socialist political party in Malaysia
- PlayStation: The Official Magazine, a magazine originally known as PlayStation Magazine or PSM
- Ponce School of Medicine, a post-graduate medical school located in Ponce, Puerto Rico
- Power Systems Mfg, a subsidiary of Alstom, specializing in aftermarket gas turbine servicing for power generating industry.
- Poznańska Spółdzielnia Mieszkaniowa, a housing cooperative administering most of the Piątkowo district of Poznań, Poland
- PSM3, a UK video game magazine specializing in Sony consoles
- PSM Makassar, a football club that plays in the Liga Indonesia
- PSM-Nationalist Agreement, a federation of regionalist or progressive-stateless nationalist political parties in the Balearic Islands
In scholarship:
- The Protocols of the Elders of Zion, acronym for Protokoly sionskix mudrecov or The Protocols of the Elders of Zion, a tract alleging a Judeo-Masonic plot for world domination
- Professional Science Master's, a postgraduate academic degree program established by the Council of Graduate Schools
In science:
- Paraspinal Musculature, the muscles adjacent to the vertebral column
- Plastarch material, or PSM, a biodegradable and thermoplastic resin
- Phase-shift keying, or Phase Shift Modulation, a digital modulation scheme
- Phase-shift mask, photomasks that take advantage of interference to improve image resolution in photolithography
- Phenol-soluble modulin, a family of protein toxins produced by CA-MRSA
- Platform-specific model, a model of a software or business system that is linked to a specific technological platform
- Phono-semantic matching, a term in linguistics that refers to camouflaged borrowing
- Propensity score matching, a statistical method used to provide unbiased estimation of treatment-effects.
- Peptide spectrum match, a (possible) identified peptide in a protein mass spectrometry identification experiment
In locations:
- Port St Mary, a port town in the south of the Isle of Man
- Portsmouth International Airport at Pease, IATA code PSM, a public-use joint civil-military airport
- El Puerto de Santa María, a city located on the banks of the Guadalete River in the province of Cádiz, Spain
In other uses:
- Protocol Service Multiplexer, a port number in Bluetooth L2CAP
- PSM pistol, a self-defense firearm for law enforcement and military officers of the USSR
- Poste sanitaire mobile, a type of French Field hospitals (France)
- Process Safety Management, a regulation intended to prevent an incident like the 1984 Bhopal Disaster
- Plus Size Model, a fashion model that models plus size clothing
- Platoon Sergeant Major, a short-lived rank in the British Army of Warrant Officer Class III
- PlayStation Move, the motion controller for PlayStation 3.
- PlayStation Mobile, the software framework
- Pro Stock Motorcycle, a drag racing class of motorcycle that is the two-wheeled equivalent of Pro Stock
- Van Westendorp's Price Sensitivity Meter, a market technique for determining consumer price preferences
- "Paranoia Survivor Max", a song by 290 from the music video game Dance Dance Revolution Extreme
- Policy Simulation Model, a static microsimulation model which encapsulates the tax and benefits system, and population, of Great Britain
- Popular Science Monthly proofreading project on English Wikisource
- Public Service Medal (Australia), a civil decoration awarded to personnel of all levels of the Australian Public Service for outstanding service
- ProTracker Studio format, a module file format that was used in many games published by Epic Games in the early 1990s
- Professional Securities Market, an equity market of the London Stock Exchange
- Plant (or Potato) Starch Material, generic label for compostable plant-based materials used as alternatives to plastics for items such as disposable cutlery, broader meaning than Plastarch