PSF is an abbreviation that may refer to:
Organisations Political parties French Social Party (Parti Social Français) (1936–1940), a right-wing nationalist party French Socialist Party (Parti Socialiste Français), active since 1969 Palestinian Popular Struggle Front Peoples Students Federation, the youth wing of the Pakistan People's Party Provisional Sinn Féin, Ireland Socialist Party without Borders (Parti Socialiste sans Frontières), a leftist party in Chad
Law enforcement Public Security Forces the principal law-enforcement arm of the Bahraini Ministry of Interior Puntland Security Force, Somalia
Business and companies P.S.F. Records, a record label Pennsylvania Shakespeare Festival, a professional theatre company Professional service firm, a company offering consulting, legal, or other services Premium Standard Farms, Inc, a pork producer Pressed Steel Fisher, a supplier of British car parts
Other organisations Pakistan Science Foundation Pharmaciens Sans Frontières Phelps Stokes Fund, a non-profit foundation Pondicherry Science Forum Python Software Foundation
Science and technology
Software and hardware PC Screen Font, a font format used in Linux systems Physical Storage Format, a data format for navigation data Portable Sound Format, a file format Progressive segmented frame, a scheme to handle progressive scan video using interlaced equipment Point spread function, the response of an imaging system to a point source Protein Segment Finder, a search engine for the Protein Data Bank Protein structure file for molecular dynamics, a chemical file format
Chemistry Polysulfone, a high-performance thermoplastic Potassium fluorosilicate, specifically when referring to phosphors
Other science and technology Performance shaping factor, factor which poses a likelihood of influencing the success or failure of the performance of a task Posterior spinal fusion Prolate spheroidal wave function
Units Pounds per square foot, a measure of pressure; see also Pounds per square inch Price per square foot
Other Pittsfield Municipal Airport (IATA airport code: PSF)