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McDonald's is one of the world's largest fast-food chains, serving a variety of popular menu items including burgers, fries, chicken nuggets, salads, and breakfast options.

The chain was founded by Ray Kroc in 1955 after he discovered a small drive-in restaurant in San Bernardino, California, called McDonald's Bar-B-Q. Kroc eventually convinced the founders to franchise their concept, which led to rapid expansion across the United States.

McDonald's is known for its signature menu items such as the Big Mac, Quarter Pounder with Cheese, and French Fries. The chain also offers a variety of breakfast options including Egg McMuffin and Sausage Biscuit.

In addition to its food offerings, McDonald's has become a cultural icon, recognized by its distinctive golden arches logo and memorable advertising campaigns such as "I'm Lovin' It."