The Drive-in system is the ideal solution for making high density storage. Typically configured as an ‘ island’ , it can be made with various depth and allows the storage of uniform material in each aisle where the pallets are located . the pallet is normally picked according to LIFO  logic ( last in – first out ), meaning the last item placed is the first one to be picked . in some cases , the aisle may contain material sorted by shipment and not by item . And can be used as FIFO by the drive-in through system.