PH (disambiguation)

pH is a measure of acidity or alkalinity.

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

Arts and media

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

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

Other uses

gollark: Exciting news: I patched my patch to nim-markdown and now it runs 25% faster *without* failing *too* many test cases!
gollark: Hmm, this actually does shave off about 25% of the runtime.
gollark: I could use cmark instead, but then extending it would be so many 🐝.
gollark: Should I just file an issue saying "horrible performance issues please help"? That seems mean.
gollark: Also, performance is identical (I tested on my test file, which doesn't use emphasis, which is the bit I ended up breaking).

See also

  • Phi (φ), a letter of the Greek alphabet
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