-Full Form of SYM is Shut Your Mouth
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-Full Form of SYM is Stubbers Young Mariners Sailing club
-Full Form of SYM is Sunset Youth Ministries
-Full Form of SYM is Singles and Young Marrieds
-Full Form of SYM is Borland C++ Precompiled header
-Full Form of SYM is Program SYMbol table (compilers and linkers)