Brewing is the production of beer through steeping a starch source (commonly cereal grains) in water and then fermenting with yeast. Brewing has taken place since around the 6th millennium BC, and archaeological evidence suggests that this technique was used in ancient Egypt. Descriptions of various beer recipes can be found in Sumerian writings, some of the oldest known writing of any sort. Brewing takes place in a brewery by a brewer, and the brewing industry is part of most western economies.

The basic ingredients of beer are water; a starch source, such as malted barley, which is able to be fermented (converted into alcohol); a brewer's yeast to produce the fermentation; and a flavouring, such as hops. A secondary starch source (an adjunct) may be used, such as maize (corn), rice or sugar. Less widely used starch sources include millet, sorghum and cassava root in Africa, potato in Brazil, and agave in Mexico, among others. The amount of each starch source in a beer recipe is collectively called the grain bill.

Greg Koch (born June 14, 1955 in Bethesda, Maryland) is a former American football tackle and guard who played eleven seasons in the National Football League, mainly with the Green Bay Packers. In 2010, Koch was inducted into the Green Bay Packers Hall of Fame. Koch was also inducted into the University of Arkansas Sports Hall of Honor. He is a licensed attorney and a part time radio personality on SportsTalk 790 KBME in Houston, Texas

Koch was a four year letterman at the University of Arkansas. He was a starter for the Arkansas Razorbacks were he was part of the offensive line that blocked for the school record 3,523 rushing yards in 1975. That same season Koch was a First-team All-SWC. Koch played in the All-America Bowl in Tampa, Flida after the 1976 season. Koch was named the Razorback 1970s All-Decade team with offensive linemen R. C. Thielemann, Leotis Harris George Stewart and Greg Kolenda. No one is quite sure whether the urban legend that Koch and Thielemann rode with outlaw motorcycle clubs during the summer while attending Arkansas is in fact true. The two did however, own and operate a tattoo parlor long before it became fashionable.