For an entity in a system, the term for being linked to other entities, that is, there being input and output between the entity and others, faster than the speed that the entity can stabilize.

For a system, having entities linked with each other.

In a common, restricted meaning for systems, implies that little trust exists between the entities, and/or that the system is organized in a centralized way, and programmers only having access to very low-level communication primitives, and having to hand-design the way information is organized in the system (which is also a form of centralization, as a one brain decides for all the system).

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