Sandwiches are a common type of lunch food often eaten as part of a packed lunch. There are many types of sandwiches, made from a diverse variety of ingredients. The sandwich is the namesake of John Montagu, 4th Earl of Sandwich, a British statesman. Sandwiches can also have notable cultural impact.

Major types of sandwiches include:

Two slices of bread with other ingredients between
Two halves of a baguette or roll with other ingredients between
Hero, hoagie, or submarine sandwich
Open-faced sandwich
Pocket sandwich
Sandwich cookies and ice cream sandwiches are generally not considered sandwiches in the sense of a bread-containing food item, but are named by analogy.
Sandwiches
American sub  United StatesTraditionally uses sliced turkey breast, ham, roast beef, American, Swiss or Provolone cheese, chopped or shredded lettuce, tomatoes and green peppers on a roll of bread.
Bacon  United Kingdom Often eaten with ketchup or brown sauce.
Bacon, egg and cheese United States  Breakfast sandwich, usually with fried or scrambled egg.
Bagel toast    Bagel toast    Israel    Pressed, toasted bagel filled with vegetables and cheese and grilled on a sandwich toaster or panini press.
Baked bean        United States (Boston area)    Canned baked beans on white or brown bread, sometimes with butter.
Barbecue[6][7][8]        United States (Texas, Tennessee, North Carolina, Alabama, Kansas, Missouri, Mississippi, Arizona, Utah, Nevada, Colorado & Louisiana)    Served on a bun, with chopped, sliced, or shredded meat (pulled pork, beef, or chicken typically), and sometimes topped with coleslaw.
     Ham and cheese, usually mantecoso, which is similar to farmer cheese.Beef (usually thin-cut steak) and cheese.
Bauru        Brazil    Melted cheese, roast beef, tomato, and pickled cucumber in a hollowed-out French roll.
Beef on weck        United States
(Buffalo, New York)    Roast beef on a Kummelweck roll, often topped with horseradish.
Beirute        Brazil    Melted cheese, sliced fresh tomatoes with oregano, lettuce leaves, roast beef on pita bread with mayonnaise.
Bifana        Portugal    Marinated pork cutlet, often served with a special sauce.
BLT        United States    Named for its ingredients: bacon, lettuce, and tomato. Often served on toasted sliced bread spread with mayonnaise.
Bocadillo        Spain    Baguette bread with some variants of filling, often eaten in cafes and tapas bars.
Bokit        France (Guadeloupe)    Guadeloupean bread fried in sunflower oil and filled with fish or meat and vegetables.
Bologna        United States    Sliced and sometimes fried bologna sausage between slices of white bread, with various condiments such as mustard, mayonnaise, ketchup.
Bondiola        Argentina    Sandwich made with thick slices of pork shoulder. The sandwiches are commonly sold by street food vendors and in restaurants in Argentina. The meat consists of slices of roasted or cured pork shoulder and it is usually served on crispy brioche bread. It can be topped with a variety of condiments and vegetables.[9]
Bosna        Austria    Usually grilled on white bread, containing a bratwurst sausage, onions, and a blend of tomato ketchup, mustard, and curry powder.
Bratwurst  Germany    A popular street food in Germany, often served on a roll with mustard in which case it is a sandwich. Some vendors offer a side dish of sauerkraut or french fries.
Breakfast roll  Ireland Convenience dish on a variety of bread rolls, containing such breakfast items as sausages, bacon, white or black pudding, mushrooms, tomatoes, hash browns, and fried eggs, often eaten with ketchup or brown sauce.
Breakfast .Known colloquially as "The Winning Combination."