An order picking system includes a paternoster conveyor having a carrier configured to carry products. The paternoster conveyor is on one side associated with at least one transporter; and on an opposite side associated with at least a plurality of further transporters that comprise a plurality of transport boxes. The plurality of transport boxes are configured to receive one or more than one product carried by the carrier. The paternoster conveyor is configured to at least one of: selectively place one or more than one product in a pre-selected transport box of the plurality of transport boxes; and selectively pick up and carry a pre-selected transport box comprising one or more than one product previously received therein. A method of handling products in such an order picking system.