Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 23 is...

23 is

  • ETB ( End of Transmission Block)

23 is also in:

Acronym Definition Searched: NSA SPLC IPC EAS OTD 59521 CFMS 24146 WCPD SOAS IMP ZELC VICAP PDS 72679