There are two management systems: drive-in and drive through rack. You could just pick up the goods from one side for drive-in rack, so it is first in last out. Drive-through rack could load goods from both side of rack.
The investment cost is relatively low, and it is suitable for storing a large number of goods of the same type. Because of its high storage density and high utilization of ground space, it is often used in warehouses with high storage space such as cold storage, food, and tobacco.