The present invention relates to a shelf system or assembly, and a shelf module therefore. The shelf module defines a pair of substantially parallel, lengthwise extending edges and a pair of substantially parallel end edges, and comprises an array of lengthwise extending slats spaced apart across the width of the module, and an array of spaced apart ribs extending between these slats which are spaced apart along the length of the module, at least a pair of the slats having outwardly and oppositely directed partition retaining connection means at or toward an upper edge thereof, between which a portion of a partition can be secured. Each of an associated partition, display strip, shelf connector module and shelf end module are also disclosed, where each of these is for removable attachment to the shelf module.