A submarine sandwich, also known as a sub, grinder, hero, hoagie, Italian sandwich, po’ boy, wedge, zep, torpedo, bocadillo or roll, is a sandwich that consists of an oblong roll, often of Italian, Spanish or French bread, split lengthwise either into two pieces or opened in a “V” on one side, and filled with various meats, cheeses, vegetables, seasonings, and sauces.[1][2] The sandwich has no standardized name, and many U.S. regions have their own names for it.[1] The usage of the several terms varies regionally but not in any pattern, as they have been used variously by the people and enterprises who make and sell them. The terms submarine and sub are widespread and not assignable to any certain region, though many of the localized terms are clustered in the northeast United States, where the most Italian Americans live.[2]The sandwich originated in several different Italian American communities in the Northeastern United States from the late 19th to mid 20th centuries. The popularity of this Italian-American cuisine has grown from its origins in Pennsylvania, New York, New Jersey, and Massachusetts to spread to most parts of the United States, and with the advent of chain restaurants, is now available in many parts of the world.[3] In Europe this would simply be known as a Baguette, a Ciabatta, or a barra, named after the type of bread being used. These types of bread are traditional breads in use in France, Italy and Spain for centuries.