Concept modelers, often called office modelers, are a class of rapid prototyping (RP) system designed specifically to make models quickly and inexpensively, without a great deal of effort. The systems are usually small, inexpensive, quiet, and require very little or no training to operate. For these reasons, the systems are targeted to reside in design office environments, where they can ideally be operated much like a standard printer, only the prints from these systems are in three dimensions.