We found 6 dictionaries that define the word V.21:

General (2 matching dictionaries)

1. V.21: Dictionary.com
2. V.21: Stammtisch Beau Fleuve Acronyms

Computing (4 matching dictionaries)

3. V.21: Free On-line Dictionary of Computing
4. V.21: CCI Computer
5. V.21: Computer Telephony & Electronics Dictionary and Glossary
6. V.21: Encyclopedia

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