Client processor device

H:\dxl\Interwovn\NRPortbl\DCC\DXL\5O5857_I.DOC-9/04/20l3 A client processor device including: a communications receiver for receiving communications packets including device 5 identification data and file fragments with transmitted application data sent to the device, without requesting the fragments; and a microcontroller system for processing a first application based on stored application data of the device whilst filtering file fragments for the device using the device identification data, and building and storing application and data files from the fragments, 10 and for subsequently processing a second application based on the transmitted application data; wherein the device stores different versions of the files, and the application and data files for the second application are selected by configuration instructions sent with the fragments.