Amazon's operation is the epitome of organized chaos:

Chaotic storage is like organized confusion. It’s an organic shelving system without permanent areas or sections. That means there is no area just for books, or a place just for televisions (like you might expect in a retail store layout). The product’s characteristics and attributes are irrelevant. What’s important is the unique barcode associated with every product that enters the warehouse…

In this storage system a wide variety of products can be found located next to each other. A necklace could be located beside a DVD and underneath a set of power tools. This arbitrary placement can even help with accuracy as it makes mix-ups less likely when picking orders for shipment.

Overall it’s a fascinating system that at its core is powered by a complex database yet run by a simple philosophy. It’s Chaotic Storage. There’s no better way to put it 🙂