Exactly when beer was first brewed cannot be determined. Two slate tablets are displayed in the British Museum in London, which were, in the year 1926, scientifically estimated to be about 9000 years old. The scientist, a Mr. E. Huber, was of the opinion that the inscriptions on these tablets showed the coarse milling of emmer (A prehistoric grain type, similar to spelt, used for the brewing of beer). He concluded that this was possibly the oldest evidence of the brewing of beer. More recent research has indicated that the tablets are probably not so old as Mr. Huber thought and that even the connection with the brewing process may be doubtful.

Beer production involves malting, milling, mashing, extract separation, hop addition and boiling, removal of hops and precipitates, cooling and aeration, fermentation, separation of yeast from young beer, aging, maturing, and packaging. The object of the entire process is to convert grain starches to sugar, extract the sugar with water, and then ferment it with yeast to produce the alcoholic, lightly carbonated beverage.