Jack in the Box Inc., together with its subsidiaries, develops, operates, and franchises quick-service restaurants (QSR) in the United States. It operates through Jack in the Box and Del Taco segments. The company engages in the operation of a hamburger chain under the Jack in the Box brand; and a Mexican-American QSR chain under the Del Taco brand. The company was formerly known as Foodmaker, Inc and changed its name to Jack in the Box Inc. in November 1999. Jack in the Box Inc. was founded in 1951 and is headquartered in San Diego, California.