McDonald's is a mega chain of fast food restaurants. The chain was founded as a BBQ joint in 1940 by Richard and Maurice McDonald. They switched to an assembly style store concentrating on hamburgers. Ray Kroc started a McDonald's franchise in 1955 and soon bought out the franchise and started the company's era of rapid growth.
The chain has produced numerous billionaires including Jon Huntsman (who sold styrofoam containers for Big Macs) and JR Simplot who developed a uniform potato for use as french fries.