British vehicle registration for Guildford
• Pacific mail
• parachute mine
• Music particular (or peculiar, proper) metre
• Past Master (of a fraternity)
• Paymaster
• Physics perturbation method
• Telecom. phase modulation
• piae memoriae (Latin: of pious memory)
• Pipe Major
• Police Magistrate
• polícia militar (Portuguese: military police)
• polizia militare (Italian: military police)
• Pope and Martyr
• Postmaster
• post meridiem (see under p.m.)
• postmortem (examination)
• powder metallurgy
• preventive (or predictive) maintenance (esp. of computers)
• Prime Minister
• product manager
• Military Provost Marshal
• airline flight code for Tropic Air