In the AEC industry, there are many of us who do not have full-blown CAD skills. Superintendents, project managers, estimators, and sales staff may all need to create drawings, but rarely own a copy of a program like AutoCAD. More often than not, we end up sketching proposed layouts and details by hand. Not only is this tedious work, but the end product is not easily edited, it's hard to store and distribute, and it doesn't look quite as professional as a digital drawing.