PSF
- Bahrain
- French Social Party
- French Socialist Party
- Ministry of Interior (Bahrain)
- P.S.F. Records
- PC Screen Font
- Pakistan Peoples Party
- Pakistan Science Foundation
- Palestinian Popular Struggle Front
- Pennsylvania Shakespeare Festival
- Performance shaping factor
- Pharmaciens Sans Frontières
- Phelps Stokes Fund
- Physical Storage Format
- Pittsfield Municipal Airport (Massachusetts)
- Point spread function
- Polysulfone
- Pondicherry Science Forum
- Portable Sound Format
- Potassium fluorosilicate
- Pounds per square foot
- Pounds per square inch
- Premium Standard Farms, Inc
- Pressed Steel Fisher
- Price per square foot
- Professional service firm
- Progressive segmented frame
- Prolate spheroidal wave function
- Protein Segment Finder
- Provisional Sinn Féin
- Public Security Forces
- Puntland Security Force
- Python Software Foundation
- Socialist Party without Borders