PH (disambiguation)

pH is a measure of acidity or alkalinity.

PH, ph, pH, and Ph may also refer to:

Arts and media

PistonHeads, a motoring website and forum
PH, formerly known as Mr. Peter Hayden, a Finnish band

Aviation

PH, Aircraft registration prefix for the Netherlands
Polynesian Airlines (IATA airline designator)
Transavia.com Denmark (IATA airline designator)

Companies and organizations

Pakatan Harapan (also known as "Alliance of Hope"), a political coalition in Malaysia

Places

Port Harcourt, (alternative name of the city)
Philippines (ISO country code PH)

Science and technology

Chemistry

Phenyl group, either -Ph or Φ, highly-stable and aromatic hydrocarbon unit found in many organic compounds
Pleckstrin homology domain, a part of many proteins which bind phosphoinositides with high affinity

Computing

.ph, the Philippines' Internet country code top-level domain
Ph protocol, an early web database search for CCSO Nameserver described by RFC 2378
PH (complexity), the union of all complexity classes in the polynomial hierarchy in computational complexity theory

Physics

Phot, or ph, a measurement of illuminance, in photometry
Picohenry, an SI Unit of electrical inductance

Other sciences

Planet Hunters, a group that hunts for exoplanets
Precipitation hardening, a heat treatment technique used to increase the yield strength of malleable materials
Pulmonary hypertension, a medical condition

Other uses

pʰ, a phoneme
PH, abbreviation for professional hunter used in East and Southern Africa
Ph (digraph), a common digraph that represents the phoneme /f/ (voiceless labiodental fricative) in phonetics
(ph), a notation used in transcripts to indicate that the transcriber does not know the spelling, usually of a name, and has spelled it as it was pronounced (phonetically)
Preston Hollow, Dallas, a neighborhood
Poul Henningsen (1894–1967), a Danish writer and designer referred to as PH in Denmark
Public house, on maps
Purple Heart, a US military award, in post-nominal designation
Parker-Hannifin Corporation (stock ticker PH)
Pinch hitter, in baseball
abbreviation used to denote the English regnal years of Philip II of Spain
P^ḥ, abbreviation (e.g. on maps) for parish, also in the meaning of civil parish
Phillips type of cross-head screw drive bits

gollark: ```haskell(....) a b c d = a (\ e f -> a (\ _ _ -> c d (\ g -> b (\ h -> c d (\ _ -> h g)) g) e (\ _ -> f e) e (\ _ -> b (\ _ i -> c d (\ j -> b (\ k -> c d (\ _ -> k j)) j) i) e)))```

gollark: HAIL THE SNAIL!

gollark: HAIL HAIL!

gollark: No.

gollark: ```ghciλ| let 1 + 1 = 86 in 1 + 186```