some mobile barcode reader programs are also required. During
the prototyping phase, client application is developed in J2ME
and installed and tested in wireless PDAs. As shown in Fig. 6, a
picking list is deployed to a wireless PDA through Wi-Fi network.
The warehouse personnel pick an item that is displayed on the
PDA screen and scan the barcode of the item. After scanning, the
wireless PDA will then display the next item for picking