Abstract: A plurality of horizontal shelves extend outwardly from a vertical supporting wall. Each of the shelves is formed on an arm structure having a pair of horizontally spaced arms connected by a cross member and a rack slidably resting on the arms across the width of the shelf lengthwise from arm to arm. The rack has a front section and a back section articulatingly interconnected, and slidable on the arms from a forward position wherein the front and back sections of the rack rest upon the arm and a rearward position wherein the front section only of the rack rests upon the arm and the back section of the rack extends perpendicularly therefrom and abuts against the wall.