Labor is a major source of cost within the food and beverage business. Furthermore, restaurants in certain rapidly gentrifying areas with poor transit are increasingly unable to hire sufficient waitpersons to service their customers to a satisfactory level. Ordering fixed items from a menu is a simple process and, in some scenarios, is only marginally less useful than ordering food items from a person.
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N/A, "Interactive Menus", Technical Disclosure Commons, (August 29, 2018)