Abstract: A Virtual Device is described which is composed of at least one Open device, e.g. a PDA, laptop or mobile phone that can be programmed, at least one Closed device, e.g. a camcorder or digital camera with a closed inner structure, and a number of Primitive devices, e.g. a head-set or microphone. A middleware installed on one or more Open Devices or on an external server will act as an operation system getting the devices to cooperate as one Virtual Device.