We found 5 dictionaries that define the word HDB3:

General (2 matching dictionaries)

1. HDB3: Dictionary.com
2. HDB3: Stammtisch Beau Fleuve Acronyms

Miscellaneous (2 matching dictionaries)

3. HDB3: Acronym Finder
4. AbbreviationZ (No longer online)

Tech (1 matching dictionary)

5. HDB3: Webster's New World Telecom Dictionary

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