Cheetos are a crunchy, cheese-flavored snack made from extruded cornmeal. Introduced by Frito-Lay in 1948, they currently sell about one billion bags per year in a number of countries. In some markets they are popular enough that the word "Cheetos" is often used as a generic term for any similar cheese puffs snack food, but it is, in fact, trademarked by the Frito-Lay company.