Chicago is sometimes called "The city that works." The nation's third largest city has a population of 9.3 million, and a diverse base of employment. Chicago is home to some of the world's largest companies, with the metropolitan area headquartering 33 of the Fortune 500 firms, according to Wikipedia.com.
Chicago, one of the country's largest transportation hubs, is a center for rail, ship, truck, and air transportation. Chicago hosts the second largest financial market in the US, and is home to a large and growing biotechnology & life sciences industry. Chicago has been known for decades as a major player in the printing, publishing, food processing, and manufacturing industries.