McDonald's had grown into an increasingly popular fast-food establishment. The first drive-thru was introduced in 1975.

In 1940, brothers Maurice and Richard McDonald established a barbecue restaurant in San Bernardino, California they called simply "McDonald's." Originally offering things like barbecued pork ...

Though the restaurant’s concept began with brothers Maurice and Richard McDonald in southern California, many of the company’s innovations have happened right here in Chicago. Here’s a look ...