What was the name of McDonald's first limited-menu service system?

McDonald's first limited-menu service system was called the Speedee Service System.

The McDonald brothers introduced the Speedee Service System after redesigning their San Bernardino, California, restaurant in 1948. The model reduced the menu and organized food preparation for faster, more consistent service.

This operating idea became part of McDonald's early brand identity. The name Speedee appeared in the company's early mascot and communicated the promise that customers would receive food quickly.

The system is often confused with later drive-through branding or with the modern McDonald's name. It was specifically the McDonald brothers' early fast-food operating model, developed before Ray Kroc expanded McDonald's through franchising.