Abstract: A modular shelving system includes active and fixed storage levels. The storage levels are removably supported from support posts and are disposed at intermediate positions between a top shelf assembly and a base shelf assembly. Each active storage level is secured to a pair of slide assemblies allowing such to be displaced from the shelving system to provide convenient access to items stored thereon. The support posts may be in the form of cylinders having an array of vertical slots for receiving mounting hardware for supporting shelves. Alternatively, support posts having longitudinal slots formed therein in combination with slotted-post inserts may be used to support the shelves. An anti-tip leg assembly can optionally be employed to provide increased stability.