Since its introduction in academia and professional practice during the 1950s, gaming has been linked to simulation. Although both fields have a few important characteristics in common, they are distinct in their form and underlying theories of knowledge and methodology. Nevertheless, in the literature, hybrid terms such as "gaming/simulation" and "simulation gaming" are used for practical or pragmatic reasons, causing confusion and ambiguity about the marking out of gaming versus simulation. Generally it is not clear whether authors are talking about games and simulations as "artifacts" of certain forms or whether they are referring to their functionality. The author elaborates on the confusion about these terms and offers a frame of reference to bring more terminological coherence and reduce methodological ambiguity. (Contains 2 tables and 2 notes.)