Drive-in racking is a system of racking meant to provide a high-density storage system for stackable items. The system generally requires a forklift to drive in all the products you need to store. It also requires the same thing to take the product out. These systems use the same point for drop-off and pick-up as well. Even though they do use a forklift, they do not have to rest on the ground. They can use up a lot of overhead space if you have the right kind of forklift.