Shelf support bracket and wall standard

A shelf support system is provided for supporting one or more shelves at selected elevations on a vertical surface. The system includes at least one standard having a rear wall, a first mounting wall extending from the rear wall, and a second mounting wall extending from the rear wall. The first and second mounting walls define between them a channel open to the front of the standard. At least one of the first and second walls defines notches which are not visible from the front of the standard, and the notches are adapted to receive a retention member on a bracket or shelf support which can be disposed within the channel of the standard. The shelf support can be tilted to an orientation that permits it be moved up or down within the standard to a different position, or to be removed from the standard altogether, or to be reinserted into the standard.