We did not include a CAD design part to our portfolio, since that is not really what we do. Our job is to provide drawings that meet patent office requirements, and since this is our specialty, we consider ourselves experts in what we do. However, in order to provide the best possible drawings, Aryeh Leib learned CAD (computer aided drawing), the same type of software that engineers use to produce the models that factories use in manufacturing. This is an example of a fire engine that Aryeh Leib produced using CAD software. Once he has produced the design on CAD software, he can rotate it and manipulate it to provide a drawing in any position, and he will use this software to produce drawings that would be difficult to produce with vector graphics, such as a multi-faceted symmetrical three dimensional structure.