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PH (disambiguation)

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pH is a measure of acidity or alkalinity.

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

  • Philippines (ISO country code PH), a country located in Southeast Asia

Arts and media

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Aviation

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Companies and organizations

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Places

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Science and technology

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Chemistry

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  • 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

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  • .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

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

Other sciences

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Other uses

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See also

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