+**A89** denotes a specific identifier, a marker within a larger [System](/wiki/system) or catalog. It might signify a celestial object, a genetic sequence, or a theoretical [Code](/wiki/code) in an abstract framework. Its meaning is context-dependent, providing a unique reference point.
+## See also
+- [Identifier](/wiki/identifier)
+- [Designation](/wiki/designation)
+- [Reference](/wiki/reference)
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