+**C1** denotes a primary, foundational element or category, often the initial point in a sequence. It represents the [First Stage](/wiki/First_Stage) or the most basic [Class](/wiki/Class) within a defined system, embodying its core characteristics.
+## See also
+- [Foundational Concept](/wiki/Foundational_Concept)
+- [Primary Element](/wiki/Primary_Element)
+- [Category](/wiki/Category)
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