In the latest sense of conceptual modeling, a model is anything used in any way to represent anything else. Some models are physical objects, for instance, a toy model which may be assembled, and may even be made to work like the object it represents. Whereas, a conceptual model is a model made of the composition of concepts, that thus exists only in the mind. Conceptual models are used to help us know, understand, or simulate the subject matter they represent.The term conceptual model may be used to refer to models which are formed after a conceptualization process in the mind. Conceptual models represent human intentions or semantics.