What name did McDonald’s use for its first major restaurant operating system?

McDonald’s used the name Speedee Service System for its first major restaurant operating system.

Richard and Maurice McDonald developed the system after redesigning their San Bernardino restaurant around speed, consistency, and a limited menu. The brothers introduced it in 1948, replacing a traditional drive-in model with a format centered on standardized preparation and counter service.

The system became an important foundation for McDonald’s later growth and franchising. Ray Kroc did not invent the original system, although he recognized its commercial potential and helped expand the business nationally. The name is also connected to Speedee, the early mascot, which is why the two terms are often remembered together.