Psi

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Psi or PSI or Ψ may refer to:

Alphabetic letters[edit]

  • Psi (Greek) (Ψ, ψ), 23rd letter of the Greek alphabet
  • Psi (Cyrillic) (Ѱ, ѱ), a letter of the early Cyrillic alphabet, adopted from Greek

Mathematics[edit]

Mind related[edit]

  • Psychology or psychologist, denoted Ψ, used in the logo of various psychological associations
  • Psi Chi, the National Honor Society in Psychology
  • Psi-Theory, a theory about the human mind, a cognitive architecture

Natural science and technology[edit]

Organizations[edit]

TV and comics[edit]

Music[edit]

Albums[edit]

  • Ψ CMX DVD a Finnish language video album by band CMX
  • PSI (album), an album by Pitchshifter

Songs[edit]

  • Psi Power, a 1978 song by the UK rock group Hawkwind

Politics and government[edit]

Finance[edit]

Miscellaneous[edit]

See also[edit]