PHOS
PHOton Spectrometer (ALICE experiment)
PHOton Spectrometer (ALICE experiment)
Performance-improving consolidation of the LHC
Proton-proton
Proton Synchrotron
Acronym doesn't need spelling out for the CERN Courier
Proton Synchrotron Booster
Paul Scherrer Institute (Switzerland)
Spell out in first use then use acronym for the CERN Courier
Polarizzazione del Vuoto con LASer (Polarisation of Vacuum with LASer), Italy
Acronym doesn’t need spelling out for the CERN Courier
Parametric X-ray radiation
Spell out in first use then use acronym for the CERN Courier
Quantum chromodynamics
Acronym doesn't need spelling out for the CERN Courier