EST Mobile Application is to further expand the data integration capability between the primary location (HQ) and the remote Site (Depot/Port Warehouse) with Microsoft Dynamic Navision as the Back end ERP by the mean of mobile client running as application on Iphone platform. The APP enable operator at remote site to be able to perform the Stock inquiry, stock transfer, stock shipment(Usage) and stock take function of NAV in Lite mode. The Mobile Warehouse allow user to perform the Optical barcode scanning thru the phose camera for better stock lookup and searching purpose. The EST Mobile Warehouse will be communicating with Navision Server thru the web service.