Noun
bacn (uncountable)
(Internet, informal) Non-spam email messages that have been signed up for, but which the recipient does not necessarily want or have time to read.
Another less well known feature that will be important over North Korea: Global Hawk’s Battlefield Airborne Communications Node (BACN) will provide a secure communications link between troops on the ground and close air support aircraft. Source: Internet
The life cycle cost estimate for BACN is more than $4.7 billion through 2031. Source: Internet