What name did McDonald's use for its original fast-service operating system launched by the McDonald brothers?

McDonald's called its original fast-service operating system the Speedee Service System.

Richard and Maurice McDonald developed the system after reorganizing their San Bernardino, California, restaurant in 1948. They reduced the menu, standardized preparation, divided tasks among workers, and designed production around speed and consistency. The approach became an important foundation of the modern fast-food model.

The name connected the system to the Speedee mascot, whose image represented fast service. It also helped distinguish the McDonald brothers' streamlined operation from the broader carhop restaurant culture common in the United States at the time.

The Speedee Service System is sometimes confused with the later McDonald's franchise system associated with Ray Kroc. Kroc expanded the business nationally and internationally, but the original operating concept was created by the McDonald brothers. The system's branding and procedures predated the Golden Arches logo and McDonaldland characters.