The compiler of this list left out “tic tac toe”. I normally call it hash or pound.
The Hash character (#) is called by many names: a.. gate b.. sharp c.. crosshatch d.. numeral sign e.. number sign f.. pound sign g.. octothorp h.. octothorpe i.. "the square key" at one telephone banking company j.. square (on some British Telecom services, e.g. when activating call divert)
