A shelf includes: a main panel unit; a slide member; and a component mounting panel. The slide member is pivotally attached to the main panel unit for pivotal movement about a first pivot axis and is configured for slidable mounting relative to an enclosure such that the main panel unit can be moved from a retracted position within the enclosure to an extended position that is forward of the enclosure. The main panel unit is pivotable relative to the slide member between a raised position and a lowered position when extended forwardly of the enclosure. The component mounting panel is pivotally mounted to the main panel unit for pivotal movement about a second pivot axis between front access and rear access positions.