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The meaning of the Acronym 21 is...
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ASCII Character Codes
21
21 is
NAK ( Negative Acknowledgement)
More Meanings For 21:
NAK ( Negative Acknowledgement)
Karachi City Code
21 is also in:
ASCII Character Codes
Telephone Country Codes
Acronym Definition Searched:
NWG
4Z2
BKWP
MEH
91754
WNAK
ML
APG
CAC
ACA
WB
33706
PN
RDS
99546