+**Fc0** denotes a fundamental [initial state](/wiki/initial_state) within a conceptual framework, marking the unadulterated starting point. It is the designated [origin](/wiki/origin) or baseline, from which subsequent developments or measurements are considered.
+## See also
+- [First Principle](/wiki/first_principle)
+- [System Theory](/wiki/system_theory)
+- [Baseline](/wiki/baseline)
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