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RECIRCULATION

Circulation

Circulation may refer to:

Circulatory system, a biological organ system whose primary function is to move substances to and from cells
Circulation (fluid dynamics), the path integral of the fluid velocity around a closed curve
Circulation (journal), one of the journals published by American Heart Association
Circulation (architecture), the flow of people through a building
Exhaust gas recirculation, a nitrogen oxide reduction technique used in most gasoline and diesel engines
Atmospheric circulation, the large-scale movement of air
Newspaper circulation, the average number of copies of a newspaper distributed on a day
Magazine circulation, the average number of copies of a periodical distributed per edition/ volume
Circulation (UK duo), a UK house music duo
Circulation problem, a generalization of network flow problems
Library circulation, the activities around the lending of library books and other material to users of a lending library
Circulation (currency), all currency held by consumers and businesses, but not by financial institutions and governments
Circulation Festival, an annual circus and fire performance festival held in Dunedin, New Zealand