Menu systems are critical to quick service restaurants and business that need to present a variety of products to customers at their store. They typically include items, prices, and some advertising graphics to help customers decide what to order. Many menu systems use changeable inserts, allowing the business to periodically update their menus. Most menus are internally illuminated, but can be externally illuminated with flood lights. Menu systems can be mounted on a wall, hung from the ceiling, or mounted on a pole. Advancements in technology have made it practical for menu signs to include order confirmation systems and LCD displays to further communicate with the customer.