. McDonald's is the largest fast food restaurant chain in the world.]] A fast food restaurant, sometimes known as a quick service restaurant or QSR, is a specific type of restaurant characterized both by its fast food cuisine and by minimal table service. Food served in fast food restaurants typically caters to a "meat-sweet diet" and is offered from a limited menu; is cooked in bulk in advance and kept hot; is finished and packaged to order; and is usually available ready to take away, though seating may be provided. Fast food restaurants are usually part of a restaurant chain or franchise operation, which provisions standardized ingredients and/or partially prepared foods and supplies to each restaurant through controlled supply channels. The term "fast food" was recognized in a dictionary by Merriam-Webster in 1951.

Arguably the first fast food restaurants originated in the United States of America with White Castle in 1916. Today, American-founded fast food chains such as McDonald's and Pizza Hut are multinational corporations with outlets across the globe.

Variations on the fast food restaurant concept include fast casual restaurants and catering trucks. Fast casual restaurants have higher sit-in ratios, and customers can sit and have their orders brought to them. Catering trucks often park just outside worksites and are popular with factory workers.

History

Some trace the modern history of fast-food in America to July 7, 1912 with the opening of a fast food restaurant called the Automat in New York. The Automat was a cafeteria with its prepared foods behind small glass windows and coin-operated slots. Joseph Horn and Frank Hardart had already opened the first Horn & Hardart Automat in Philadelphia in 1902, but their “Automat” at Broadway and 13th Street, in New York City, created a sensation. Numerous Automat restaurants were built around the country to deal with the demand. Automats remained extremely popular throughout the 1920s and 1930s. The company also popularized the notion of “take-out” food, with their slogan “Less work for Mother”. The American company White Castle is generally credited with opening the second fast-food outlet in Wichita, Kansas in 1921, selling hamburgers for five cents from its inception and spawned numerous competitors. It is arguable because most historians and Secondary School textbooks state that A&W was the first fast food restaurant, which opened in 1919.(E. Tavares)

The hamburger restaurant concept which is most associated with the term "fast food" was created by two brothers originally from Nashua, New Hampshire. Richard (Dick) and Maurice (Mac) McDonald opened a barbecue drive-in in 1940 in the city of San Bernardino, California. After discovering that most of their profits came from hamburgers, the brothers closed their restaurant for three months and reopened it in 1948 as a walk-up stand offering a simple menu of hamburgers, french fries, shakes, coffee, and Coca-Cola, served in disposable paper wrapping. As a result, they were able to produce hamburgers and fries constantly, without waiting for customer orders, and could serve them immediately; hamburgers cost 15 cents, about half the price at a typical diner. Their streamlined production method, which they named the "Speedee Service System" was influenced by the production line innovations of Henry Ford.