Modularity can refer to one of the following things:

• In biology, modularity refers to the concept that organisms or metabolic pathways are composed of modules.
• In cognitive science, the modularity of mind refers to the idea that the mind is composed of independent, closed, domain-specific processing modules.
• In computer science, modularity is the property of computer programs that measures the extent to which they have been composed out of separate parts called modules.

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