Sunbeltracks.com has alot of information on pallet shelving and the different types of pallet shelving that is available. They also provide pictures.
It can be difficult to explain what racking and shelving is exactly. Racking and shelving is essentially taking items off of pallet racks and putting it on shelves.
You can find more information on pallet shelving here: http://www.ontarioindustrial.com/. And if you live in Ontario, you can purchase your pallet shelves here as well.
Dexion is a manufacturer of industry storage and distribution solutions. They build pallet racking and shelving, as well as lifts and mezzanine floors.
A pallet jack is the same as a pallet truck, which helps move large items. the pallet jack is hydrauilc and is used in large wolesale stores like costco and sams club.
Conveyor & Storage Solutions, Inc. is a material handling company in the Los Angeles and San Diego areas. They offer pallet racks, including installation and repair, as well as other products like catwalk shelving and stairs.
Common types of material handling equipment include forklifts, pallet racking, shelving, conveyors, on-rails transfer carts, cranes, diggers and mezzanines.
Pallet jacks are typically not available for rent through Home Depot. Chances are that if you check Craigslist you'll be able to find exactly what you are looking for.
Warehouse shelving includes a variety of different rack styles. The purpose of warehouse shelving is to provide shelving options for a wide variety of goods in a warehouse setting. Rack styles include pallet racks, which allow goods to be transported via pallets, bulk racks, which allows for goods to be manually transported, and cantilevers, which have adjustable arms. For more information and ordering options, check out: http://www.shelving-direct.com/warehouse-shelving.asp and http://www.rackandshelf.com/
Pallet Wrapping or shrink wrapping as it is often called is the process of using a think stretch plastic or film in many layers to hold things in place on a pallet. It is often used to transport many items at once without worry or them moving, falling in transit.
The Dexion website has a complete list of their racking options listed under the "products" tab. This includes their pallet racking, vertical storage, shelving systems and cantilever racking.
Ikea offers lightweight plastic shelving units. Just about any wall can handle these lightweight shelving units.
Modular shelving ca be bought in Ikea, or there is an online shop called Fab that sells modular shelving. Ebay and John Lewis are also contenders for modular shelving.