Tuple

  A finite sequence of elements, occurring in a prescribed order. An n-tuple is a sequence of n elements; Cartesian coordinates (x, y, z) in Euclidean space are a 3-tuple, a personnel file may contain a 20-tuple for each employee, like name, birthday, phone number, etc. An n-tuple may contain real numbers, and then is equivalent to an n-vector, and any n-tuple may be stored as a record; these notions are, in fact, largely overlapping (at least in everyday computer jargon).