Abstract: An order filling system utilizes a server computer, a controlling computer and location verification devices to direct an orderfiller to order items stored in an inventory storage area. The server computer transmits order information to the controlling computer via wireless radio frequency communications. The controlling computer communicates with location verification devices via short range wireless communications. The controlling computer provides the orderfiller with directions and pick quantities for each inventory item in an order. The location verification devices and location clips are mounted throughout the inventory area and on the inventory carriers. The location verification devices may have a low power mode which conserves electrical power while the location verification device is not being used.

Abstract: An order filling system used in an inventory storage area having a controlling computer and a network of user interface devices which each have a microprocessor, memory and the ability to independently process information. The controlling computer coordinates communications with the user interface devices through poll broadcasts. The controlling computer transmits order information to the user interface devices which display the order information to assist workers in picking inventory order items. When the workers pick the specified quantity of an order items they press confirmation buttons on the user interface devices which transmit confirmation signals to the controlling computer. If special processing is required, the user interface device is capable of performing various tasks which reduces the processing requirements of the controlling computer.