Common keg sizes, dimensions, types, kegerators, and how many draft beers are in each keg, by gallon and liter.
The International Bitterness Units or IBU is one way to measure how a beer tastes in terms of bitterness. While the bitterness of beer plays a significant role in a flavor profile, it is only one of many factors. Alcohol content, malt and water quality, yeast fermentation byproducts, bacteria, and aeration also affect a particular beer's taste profile.
The craft beer variety pack is the world's biggest gamble. You could get introduced to your next favorite IPA. Or, you could get stuck with Old Fezziwig.