Chicago O Hare International Airport is a provider of air transportation services. The airport features transport links to the city of Chicago, such as public transport, taxis and limousines, and shuttle services. It is equipped with several terminals and serves more than 35 domestic and international commercial carriers and 40-plus cargo airlines. The airport also provides an array of restaurants, lounges, retail shops and facilities. It offers more than 50 dining and drinking establishments, including Cinnabon, Chili s, Dunkin Donuts, Graystone Coffee, Great American Bagel, Hotdog Express, McDonald s, Quiznos, Starbuck s Coffee, TCBY and Wolfgang Puck. Its shops and facilities include stores for computer equipment, books and jewelry; automated teller machines; currency exchange; a medical center; a post office; and a chapel.