B 21

B 21 stands for:

• the federal highway 21 in Germany
• the Gutensteiner road (B 21) in Austria

B-21 stands for:

• the cipher machine B-21 (machine) by Boris Hagelin from 1925
• the Northrop Grumman B-21 bomber under development

This is a disambiguation page for differentiating between several terms identified with the same word.