What was the original name of McDonald's 1955 corporate entity founded by Ray Kroc?

Ray Kroc's 1955 corporate entity was originally named McDonald's System, Inc.

Kroc established McDonald's System, Inc. as part of his effort to expand and coordinate the McDonald's franchise business. The name reflected the importance of the operating system: standardized procedures, restaurant layouts, service expectations, and menu consistency.

The company later changed its corporate name to McDonald's Corporation in 1960. That change is why many summaries use McDonald's Corporation when discussing the business's early expansion, even though it was not the original 1955 name.

The corporate name is a branding-history detail rather than the name of the first restaurant. The McDonald brothers opened their San Bernardino restaurant in 1940, while Kroc's corporate structure came later as the franchise operation grew.