Ok, so I read that a tuple is an ordered list of n elements, where n is a non-negative integer. Sometimes I get confused with tuples and partially ordered sets. So if I organized a list of all the airplanes in a particular airport, would that be a tuple, or would that be a set? I'm leaning towards it being a set, but by reading the definition of a tuple, I can also see it being a tuple. Other than a point in a graph, or a vector, where else in real life would I see something and say, "look, there's a tuple!!!". I would really want a clear definition in layman's terms so that I can be able to have these concepts clear in my mind, in particular the concept of a tuple.