a modular shelving system including a plurality of support posts , a plurality of shelves having respective support members for supporting each of the plurality of shelves at selective locations on the plurality of support posts , and at least one divider including first and second support beams and a plurality of partitions disposed between the first and second support beams . each of the first and second support beams is supportable on one of the plurality of shelves at first and second ends of the support beams , and each of the plurality of partitions is supported at respective ends thereof by the first and second support beams and projecting away from the first and second support beams , thereby defining a respective plurality of slots between the plurality of partitions .