The Subway is a famous restaurant franchise, which mainly sells submarine sandwiches as well as different types of salads. The restaurant is owned, managed, and operated by DAI (Doctor's Association Inc,) and it is the fastest growing franchise expanding its business all over the world. Currently the company operates about 37881 restaurants in more than 98 countries. The Subway is biggest single brand chain of restaurants having many segments across the world. Its headquarters is located in Milford, Connecticut and it has five centers, which supports the operations of the chain of restaurants. The core food of this restaurant is submarine sandwich and the menu also includes many other food products like wraps, salad, baked goods.