Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym HDB3 is...

HDB3 is

  • High-Density Bipolar Three-Bit substitution

HDB3 is also in:

Acronym Definition Searched: CIA MER PDC 85063 NSF 65 WIR 31737 VPL STORM MAD PM SOS ANF REL