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From Wikipedia, the free encyclopedia
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OP or Op may refer to:

Arts and entertainment[edit]

  • One Piece, a 1997 Japanese manga and anime
  • OP, an abbreviated term for opening theme songs in anime
  • Opposite prompt, a stage right prompt corner on a theatre stage
  • Optimus Prime, a character from the Transformers franchise
  • Op., short for opus number, used to denote one work of musical composition from many
  • Original pronunciation, the phonology of Early Modern English, as used in William Shakespeare's time, specifically when used to perform his works in modern times.
  • Out of print, a status of a book title at a publishing house

Businesses and organizations[edit]


  • Original post (or poster), the opening entry (or author thereof) in a thread or discussion in an internet forum
  • Overpowered (game balance), in video games, when a particular aspect or character is lacking game balance

Mathematics and computers[edit]


Other uses[edit]

See also[edit]