Question: what are the different types of oats?
Answer: Rolled Oats.
Old-Fashioned Oats: The whole grains are steamed, flattened by the roller, and then flaked. ... 
Recipes with Old-Fashioned Oats:
Quick-Cooking Oats: The oats are cooked, dried, and cut, then rolled thin (thinner than old-fashioned oats) for faster cooking.