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The coupling term Jun 30, 2020

The external coupling

A set of modules that all access the same global simple variable, not the same global data structure, and do not pass information about that global variable through a parameter table is called external coupling.

Common coupling

When a set of modules all access the same common data environment, the coupling between them is called common coupling. Common data environments can be global data structures, Shared communication areas, common overlays of memory, and so on.