Cereals are one of the most important food crops, also known as grains and are basically grasses obtained from family poaceae. They provide a fair amount of vitamins, minerals and other dietary fibers. They are being used in making breads, tortillas, oats and other fiber rich eating products. There are different types of cereals that are being used around world, as staple foods in different countries and continents. Wheat, rice, jowar, millets and oats are one of the most important cereals. Cereals are also used in different industries as in production of glucose, adhesives, oils, alcohol and food processing industries also. Wheat is one of the most old and domesticated grains and rice being the second most used and staple crops in major Asian countries. Their grasses are being used as animal fodder and raising livestock. Different cereals are cultivated in different regions of world according to their temperature, soil and water requirements. They are being used for different purposes also, as using their by-products in different industries as these days in biofuel processing industries also.