Abstract: A modular display system for the efficient storing and displaying of a variety of substantially flat products, such as alphanumeric sign characters, includes a first display module having a width of a single length unit, an open front, a first arrangement of internal divider elements separating the internal volume of the first module of a plurality of predetermined volumes, each shaped to receive a predetermined amount of a particular product, a second display module having a width of two length units, a second internal divider arrangement separating the internal volume into a second plurality of volumes, each shaped to receive a predetermined amount of a particular product, a strip extending along the first and second modules for receiving indicia indicative of the contents of each of the first and second volumes and a connector for interconnecting a first and second module such that a plurality of first and second modules can be attached to each other and arranged in a plurality of configurations to form di