+**System Boundary** is the conceptual line that defines what is part of a [System](/wiki/system) and what is outside, belonging to its [Environment](/wiki/environment). It clarifies the scope of a system, determining what elements, processes, and data are considered internal or external.
+## See also
+- [Scope](/wiki/scope)
+- [Interface](/wiki/interface)
+- [Abstraction](/wiki/abstraction)
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