any of various units of capacity; "a barrel of beer is 31 gallons and a barrel of oil is 42 gallons"
bbl barrel(s) a common unit of measurement of liquids in the petroleum industry; one barrel equals 42 US gallons
B- backup The act of a resource manager in using a log to restore resources to some predetermined state by applying log entries sequentially to the resource until the desired state has been achieved BBL See Bulletin Board Liaison (BBL)