Abstract: A stackable/nestable/dividable storage bin has an angled stacking tongue at its upper rear edge and a closed-end stacking channel at its lower rear edge. These are engageable with corresponding elements of like bins above or below so that two or more bins can be stacked, with the engagement of a tongue in a channel serving to limit relative vertical, longitudinal and lateral movement, and with lower side wall corners of an upper bin being received in rear wall notches of a lower bin for vertical positioning and added lateral support. The bin also has divider slots that extend behind and through stepped side wall portions to receive L flanges on the edges of a divider plate. Partially unsupported side wall portions serve as resilient lock tabs that bear against the divider flanges, and outer bosses that enclose the slots also serve as nesting stops engageable with the side wall steps of a lower bin.