What’s the difference between salt pork and fat back?

What’s the difference between salt pork and fat back?
Salt pork refers to heavily salted slabs of pork belly and pork sides. Dry or wet brine is used to cure and preserve the fat and small amount of meat in these cuts of pork. Salt pork shouldn’t be confused with fatback: fatback is from the back of a hog, and it isn’t salted — most often it’s rendered into lard.