Editing Circulation (section)

==Science and technology==
* [[Atmospheric circulation]], the large-scale movement of air
* [[Circulation (physics)]], the path integral of the fluid velocity around a closed curve in a fluid flow field
* [[Circulatory system]], a biological organ system whose primary function is to move substances to and from cells
* [[Circulation problem]], a generalization of network flow problems
* [[Circulation (architecture)]], the flow of people through a building
* [[Circulation (currency)]], all currency held by consumers and businesses, but not by financial institutions and governments
* [[Exhaust gas recirculation]], a nitrogen oxide reduction technique used in most gasoline and diesel engines
* [[Library circulation]], the activities around the lending of library books and other material to users of a lending library
* [[Ocean circulation]], the large-scale movement of water
* [[Rhetorical circulation]], the ways that texts and discourses move through time and space