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What does PFO stand for?

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Rank Abbr.Meaning
PFOPatent Foramen Ovale (defect of the heart)
PFOPersistent Foramen Ovale (cardiology)
PFOPower Fail Output
PFOPaphos, Cyprus - International (Airport Code)
PFOPissed Fell Over (UK medical slang for drunk patient)
PFOProfit From Operations
PFOPyruvate:Ferredoxin Oxidoreductase
PFOPerron-Frobenius Operator
PFOPinyon Flat Observatory (earthquake reporting station)
PFOProperty and Fiscal Office
PFOPlutonium Finishing Operation
PFOPalustrine Forest (environmental science)
PFOPink Floyd Online (fan site)
PFOPlease Frig Off (polite form, as in a PFO letter for a refused resume)
PFOPaint Flag Offset (marking underground utilities)
PFOProject Formulation Office (NASA)
PFOPrincipal Federal Official (US DHS)
PFOPittsburgh Field Office (Pennsylvania)
PFOPlaying for Others (teen development program; Charlotte, NC)
PFOPersistent Felony Offender (various states)
PFOPinedale Field Office (US DOI)
PFOPyrolysis Fuel Oil

Note: We have 75 other definitions for PFO in our Acronym Attic