In a wall-mounted shelving and/or storage system, vertical standards are mounted to a wall using a plurality of individual cleats arranged in vertical columns and horizontal rows. The width of each cleat is smaller than the width of the standard, so that it can be hidden within the standard when mounted. Formed on the back of each vertical standard are a plurality of transverse edges at predefined intervals, in known spatial relationships with bracket connection points, for cooperating with the cleats to properly position and orient the standards at the correct height with respect to each other.