What does PSF stand for?

Packet Switch Facility - Telecommunications (ACOL)

Packet Switching Facility

Pakistan Science Foundation

Panama Sea Frontier

Panhandle & Santa Fe Railway Co. - AAR code

Parents for Safe Food - An association (BUAC)

Parti Social Francais - French Social Party - Political party (PPE)

Passive Solar Foundation - Defunct (EA)

Pattern Sensitive Fault (SAUS)

Payload Servicing Fixture (SAUS)

Payload Structure Fuel - Ratio

Peptide Supply Factor - Biochemistry

Performance Shaping Factor - Engineering

Performance Shaping Factors (SAUS)

Permanent Signal Finder

Permanent Swap File (SAUS)

Personal Silicon Foundry (IAA)

Per Square Foot (ADA)

Phelps-Stokes Fund (SAUS)

Philippine Sea Frontier

Pittsfield - Massachusetts - Airport symbol (AD)

Pittsfield, MA - Location identifier - FAA (FAAL)

Plutonium Stripper Feed - Nuclear energy (NRCH)

Point Spread Function

Polystyrene Foam (SAUS)

Polysulfon (SAUS)

Polysulfone - Organic chemistry

Popular Struggle Front - Palestine - Political party (PD)

Port Stanley - Falkland Islands - Seismograph station code, US Geological Survey - Closed (SEIS)

Posterior Spinal Fusion - Medicine (DAVI)

Post Stimulus Flow (SAUS)

Pound-Force per Square Foot (IAA)

Pound-force/Square Foot (SAUS)

Pounds per Square Foot

Power Separation Filter (IAA)

Preservation Services Fund

Presidio of San Francisco - Military (AABC)

Prime Subframe (MCD)

Print Services Facility (SAUS)

Private Sector Financing (SAUS)

Private Source Funds (DNAB)

Probability of Spurious Fire - Military (CAAL)

Probability Sample File - Human Relations Area Files - Information retrieval

Processing and Staging Facility - Solid rocket booster (NASA)

Processing and Storage Facility - NASA (NASA)

Process Signal Former (IAA)

Production Sharin Formula (SAUS)

Product Sharing Formula (SAUS)

Program for the Study of the Future (EA)

Program Support Facility (USDC)

Progressive Space Forum - Defunct (EA)

Progres Social Francais - French Social Progress - Political party (PPE)

Provisional Sinn Fein - Northern Ireland

Provisional System Feature - Telecommunications (TEL)

Prudential Strategic Income Fund - NYSE symbol (COMM)

Pseudosarcomatous Fasciitis - Medicine

Saint Francis College, Loretto, PA - OCLC symbol (OCLC)

Pounds per Square Foot (IDOE)