+**D4b** is a specific [Classification](/wiki/classification) within a larger hierarchical system, often used to pinpoint a particular variant or subtype. It signifies a distinct group, distinguished by unique characteristics that set it apart from other [Designations](/wiki/designation).
+## See also
+- [Taxonomy](/wiki/taxonomy)
+- [Category](/wiki/category)
+- [Nomenclature](/wiki/nomenclature)
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