the initialism of the organization now known as PEN International PolyEthylene Naphthalate PEO – (i) Παγκύπρια Εργατική Ομοσπονδία (Greek for "Pancyprian Federation of Labour") – Philanthropic Educational Organization – PolyEthylene Oxide – Professional Employer Organization – Professional Engineers Ontario PEPFAR – (a) President's Emergency Plan For AIDS Relief PER – (s) Peru (ISO 3166 trigram) perl – (a) usually lower case Practical Extraction and Report Language PERM - Program Electronic Review Management PES – (i) PolyEtherSulfone PEST – (a) UK Public Engagement with Science and Technology PET – (a/i) Personal Electronic Transactor – Pierre Elliott Trudeau – Positron Emission Tomography (as in PET scan) – PolyEthylene Terephthalate (plastic) – (a) Preliminary English Test PETA – (a/i) pentaerythritol triacrylate – People Eating Tasty Animals – People for the Ethical Treatment of Animals PETE – (i) PolyEthyleneTErephthalate PETP – (i) PolyEthyleneTerePhthalate PF pF – (s) picofarad PF (s) French Polynesia (ISO 3166 digram) petafarad (i) Phenol Formaldehyde (resin) Power forward, a player position in Australian rules football, basketball, and ice hockey PFD – (i) Permanent Fund Dividend = personal flotation device PFE – (i) Permanent Forest Estate PFLAG – (p) Parents, Families and Friends of Lesbians and Gays ("pee-flag") PFIY – (a) Please Fix it Yourself ("pee-fiy") PFO – (i) Pissed, Fell Over (medical diagnosis in-joke) PfP – (i) Partnership for Peace PFW (i) Pro Football Weekly (magazine and website covering the National Football League) Purdue University Fort Wayne PG pg – (s) picogram Pg – (s) petagram PG – (i) propylene glycol (s) Papua New Guinea (ISO 3166 digram) (i) Parental Guidance (movie rating) Point guard (basketball position) PG-13 (disambiguation) – (p) (movie rating) PGCE – (p) Postgraduate Certificate in Education PGD – (i) Pre-implantation Genetic Diagnosis PG&E – (i) Pacific Gas & Electric PGENI – (i) Pharmaco-Genetics for Every Nation Initiative PGH – (i) Pre-implantation Genetic Haplotyping PGK – (s) Papua New Guinea kina (ISO 4217 currency code) PGM – (i) Precision-Guided Munition PGP – (i) Pretty Good Privacy PH pH (s) parts of hydrogen (acidity/alkalinity index) picohenry PH (i) Passive Homing (missile guidance system) (s) petahenry Philippines (ISO 3166 digram) (i) Probability of Hit Professional hunter (abbreviation used mostly in East and Southern Africa) Public Health Purple Heart (i) Pakatan Harapan (Malaysia) PHA (p) PolyHydroxyAlkanoate (i) Potentially hazardous asteroid Ph.D. – (p) Philosophiæ Doctor (Latin, "Doctor of Philosophy") PHEV – (i) Plug-in hybrid electric vehicle PHF (i) Paired helical