OP

OP or Op may refer to:

General

• Observation post
• Ocean Pacific
• One Piece, a Japanese manga and anime created by Eiichiro Oda
• Op art
• Opening song for an anime
• Operator
• Optimus Prime
• Oliver Peoples
• Opus number (usually classical music)
• Orange Pekoe
• Oratory Preparatory School
• Ordo Praedicatorum ("Order of Preachers"), the official name of the Dominican Order; Dominicans often use the letters "O.P." after their names to indicate membership.
• Overall Position, the grade appointed to Queensland high-school graduates
• Overland Park, Kansas, a city in the Kansas City Metropolitan Area
• Orland Park, Illinois, a city south of Chicago
• Orchard Park, New York, a town south of Buffalo, New York
• Overpowered, internet slang referring to poor game balance.
• A channel operator on IRC
• Original Post, the first post (or posting) on a topic on a blog, often containing the original question or topic of discussion.
• Original Poster, the first person to post upon a topic.
• OpenID Provider

Medicine

• Oropharyngeal airway
• Organophosphate (poisoning)
• Osteitis pubis, commonly called OP in Australia
• Osteoporosis

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