Why do fast food restaurants call hamburgers sandwiches?

Meat and other condiments placed between two pieces of bread to be picked up and consumed has been known as a “sandwich” for several centuries, now. read more

Any type of bun with cold filling is usually called a "roll" e.g. salad roll, ham roll etc Any bun with hot filling is usually called a burger e.g. hamburger, chicken burger, fish burger, vege burger. read more

If the company produces chicken or fish sandwiches, they are often grouped on the display board with the burgers. It might just be a matter of simplicity, calling everything on a bun a sandwich instead of differentiating between the two. I honestly don't know, just postulating a theory. Either way, fast food is gross, it just doesn't cut it. read more