Pf

pF
Abbreviation of picofarad, the farad is the SI unit of capacitance.
PFCs
Abbreviation of Perfluorocarbons.
Pflops
One quadrillion (1015) floating-point operations per second.
PFM
Abbreviation of Pulse Frequency Modulation.
Pfund Series
The series which describes the emission spectrum of hydrogen when the electron is jumping to the fifth orbital.