Biscuits have a long shelf life; are eaten straight from the pack; and are nutritious and available in many forms, both sweet and savoury. Biscuits have many functional forms, enriched with calcium, iron and vitamins and formulated for infants, children and the elderly and for those with special needs such as gluten-free foods. Biscuits broadly fall into four categories, distinguished by their recipes and process: crackers; hard sweet and semisweet biscuits; short-dough biscuits; and cookies, including filled cookies.
A snack is a small portion of food generally eaten between meals. Snacks come in a variety of forms including packaged snack foods and other processed foods, as well as items made from fresh ingredients at home.
Traditionally, snacks are prepared from ingredients commonly available at home without a great deal of preparation. Often cold cuts, fruits, leftovers, nuts, sandwiches, and sweets are used as snacks. With the spread of convenience stores, packaged snack foods became a significant business.