Preferably as shown, all of the shelf units 22 are formed of a polyvinyl chloride (PVC) tubing to which standard tee or other joining pieces are provided, all to the goal of size and shape of the various shelf sets to best meet the needs and methodologies of the particular office; and details such as legs for the various shelf units 22,50,52,54, 56,58, and 62 are of course provided to fit the part