Anyone who runs a business or works in an IT department will know very well just the sheer quantity of IT and basic technological equipment that will be needed in a business, storefront, retail store, corporate office, call center, service location, etc. All of this equipment needs to go somewhere, hence the need for an IT room, sometimes called a "Tech Closet." As for how such equipment is set up, one can't rightly have it strewn around on the floor where an errant foot or coffee cup may ruin an expensive piece of machinery, so wall shelves and adjustable shelves are perfect for this exact purpose.
Wall shelves that also offer wire shelving options too are the perfect solution for setting up multiple servers, A/V equipment, networking machines, communications equipment, etc. Shelving is usually made from cold-hardened steel, and is perfect for holding hundreds and hundreds of pounds of equipment. Some shelving arrangements can even hold more than a thousand pounds of equipment, all safe and stable and off the ground and well organized too. Shelving units can be customized to the exact needs and wants of the customer as well, making them the perfect solution for setting up a large amount of equipment.