Subway Restaurant is a part of an international chain of sandwich shops. Subway has developed into one of the largest chains in the world with more than 30,000 locations in 91 countries. Founded in 1965, Subway became a franchise in the mid-'70s. Its menu options include deli subs, hot subs, salads, pizza, breakfast and more. Subway is known for low-calorie cuisine, unlike many other on-the-go restaurants.