An arrangement includes at least one shelf system including movable shelves, at least one operating station for collecting items from a movable shelf at the operating station, a first lift for transporting the movable shelves between parking positions of the shelves in the shelf system and the operating station, a second lift for transporting and engaging palletless variable size items. The second lift is capable of docking to the movable shelves of the shelf system for communicating items to the movable shelves or from the movable shelves.