How to determine install SR?

Question:
All,
I am trying to determine the install Release (SR). We are currently using APO 3.0A (but I need to know which SR 1, 2, or 3 was installed because each have different upgrade manuals)
Any information would be helpful.
Thanks in advance,
-Khoi
Answer:
Go to SM51....and you can see release information
ChazWaz

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