- basso continuo.
- used as a notation on the copy of a letter or other document sent to a third person without the addressee's knowledge.
- buoyancy compensator.
- British Columbia, Canada (approved for postal use).
- before Christ (used in indicating dates).
- bills for collection.
- Bachelor of Chemistry.
- Bachelor of Commerce.
- bass clarinet.
- battery commander.
- British Columbia.
- (indicating years numbered back from the supposed year of the birth of Christ) before Christ
- British Columbia
