Abstract: A shelf unit includes side panels and top and bottom shelves that extend between the side panels. The shelves are coupled to the side panels. The side panels each have plural interior cavities that are open at the rear edges of the side panels. The cavities are adapted to receive wall mounting brackets that project out from a wall. The rear edge of each side panel has a channel for receiving a shelf standard or wall mounting strip. The shelf unit is installed onto a wall by pushing the unit towards the wall, with the brackets being received by the cavities and the mounting strips being received by the channels. When installed, the mounting hardware is concealed from view. Another embodiment utilizes side panels without interior cavities. Instead, the side panels each have a channel along their respective rear edges. Wall standards, having keyhole shaped slots, are received by the channels. Fasteners are located in each channel and are coupled to the side panel.