Abstract: This display system includes tubular frame components which are easy to assemble, disassemble and rearrange to form various types of display units. The frame components are provided with interlocking connector means which includes a multi-sided stud extending outwardly from one end of one frame component and the other frame component has first and second multi-sided openings provided in opposite walls thereof and aligned perpendicular to the longitudinal axis of the frame component to receive the multi-sided stud therein. Means is provided for removably locking the multi-sided stud of one frame component in the first and second multi-sided openings in the other frame component to rigidly maintain the adjacent end of the one frame component against one wall of the other frame component and in right-angular and non-rotating relationship thereto.