PH
Encyclopedia : P : PH : PH : PH
PH or ph or pH or Ph may be:
- pH, a measure of acidity (chemistry)
- Ph, a phenyl ring (organic chemistry)
- PH, the ISO country code of the Philippines (see .ph, the Internet country code top-level domain (ccTLD) for that country)
- ph or phot, a measurement of illuminance (photometry)
- PH, the union of all complexity classes in the polynomial hierarchy (computational complexity theory)
- the Greek letter φ (Greek alphabet)
- Ph (digraph), a digraph (two graphemes, p and h) that represents the phoneme /f/ (phonetics)
- [[The Legend of Zelda: Phantom Hourglass]], a video game
- Polynesian Airlines IATA airline designator
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