Scale model is actually most generally a physical representation of the object, which maintains accurate relationships between all important aspects of the model, although absolute values on the original properties does not need to be preserved. This permits it to display some behavior or property on the original object without examining the initial object itself. One of the most familiar scale models represent the appearance of an item in miniature, but there are various other kinds. Scale models are used in many career fields including engineering, structure, film making, military command, salesmanship as well as fun in interest model building.