ABV = Alcohol by Volume
Al = Aluminum
APA = American Pale Ale
AAU = Alpha acid unit (the potential bitterness of hops)
B = Brix or Balling (a measure of sugar)
B3 = Beer, Beer, and More Beer (homebrew supplier)
BMC = Bud Miller Coors
BW = Barleywine
BYO = Brew Your Own magazine...