+**E78** identifies a specific state or a particular classification within a defined system. Often marking a critical threshold, it differentiates a unique [Entity](/wiki/Entity) from other designations. Its presence guides [System Analysis](/wiki/System_Analysis) and further categorization.
+## See also
+- [Classification](/wiki/Classification)
+- [Identifier](/wiki/Identifier)
+- [Threshold](/wiki/Threshold)
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