Most food needs some form of preparation and processing to make them more attractive to eat. Foods such as grains, fish and vegetable are unpalatable in their raw state. Others such as cassava are dangerous if eaten without processing. Many different processes have been developed and, wherever there are communities of people, the treatments, methods and recipes used will be a reflection of their requirements. Processing provides for security food supply, it can enhance the keeping quality of the original materials and, moreover, it can provide the basis for making a reasonable living. Food industries are an excellent source of income for the entrepreneur.