(i) Partial Mission Capable Supply (SM&R code) – Power Management Control System – Professional Military Comptroller School PME – (i) Professional Military Education PMHT – (i) Pardon My Hashtag (Also #PMHT) PMI – (i) Positive Material Identification PMID – (p) PubMed Identifier PMMA – (i) PolyMethylMethAcrylate PMOS – (i/a) P-type/Positive Metal-Oxide-Semiconductor transistor ("pee-moss") PMS – (i) Premenstrual Syndrome PMSC – (i) NATO Political-Military Steering Committee on Partnership for Peace PMSL – (i) Piss Myself Laughing (Internet shorthand) PMT - Premenstrual Tension (UK) (see Premenstrual Syndrome) PN pN – (s) piconewton PN (s) petanewton Pitcairn Islands (ISO 3166 diagram) (i) Perikatan Nasional (Malaysia) PNAC – (i) Project for the New American Century PNC (i) Palestinian National Council Palmerston North City (cf. PNC, a New Zealand rapper from this city) Parti nationaliste chrétien, defunct Quebec political party Pittsburgh National Corporation, one of the two companies that merged into today's PNC Financial Services Provident National Corporation, the other company that merged into PNC Financial Services PNF – (i) Pilot Not Flying (aviation) PNG (s) Papua New Guinea (ISO 3166 trigram) (i) Portable Network Graphics PNP Parti national populaire, defunct Quebec political party (i) Partido Nuevo Progresista Plug 'N' Play/Pray Positive Negative Positive PNS – (s) Pensacola, Florida (IATA airport code) PNVS – (i) Pilot Night Vision Sensor PNH (i) Paroxysmal nocturnal hemoglobinuria Police Nationale d'Haïti (French, "National Police of Haiti") PO Po – (s) Polonium PO (s) Dust Devil (METAR Code) (i) per os (Latin, "by mouth") (s) Portugal (FIPS 10-4 country code) PO – (i) Post Office PO – (i) Purchase Order POCD – (i) Post-Operative Cognitive Dysfunction pod – (a) Plain Old Documentation POD (i) Payable on Death (banking term, and the full name of American metal band P.O.D.) Point of divergence (alternate or counterfactual history) Port of Debarkation POE – (a) Perl Object Environment – (b) Port Of Embarkation (c) Polyol Ester (d) Power Over Ethernet POETS – (a) Portable Occultation, Eclipse, and Transit electronic-camera System POFF – (a) Plain Old Flat File POG – (a) Passionfruit, Orange and Guava POGO – (a) Project On Government Oversight POI – (i) Program Of Instruction POK – (a/i) Plane Of Knowledge pol – (s) Polish language (ISO 639-2 code) POL (i) Petroleum, Oils and Lubricants (s) Poland (ISO 3166 trigram) POLAD – (p) Political Advice POM (i) Program Objective Memorandum PolyOxyMethylene POMDP – (i) Partially observable Markov decision process POP (a/i) Point