Abstract: A command device which comprises a plurality of interactive command sources enabling any number of heterogeneous systems to be accessed, each command source being reconfigurable and having commands of a first type which cause the configuration of this source to change, and commands of a second type, specific to each of the configurations, and each system transmitting at the end of execution of the command information relating to the status of the system, on the one hand, perceptibly on the command sources situated in the configuration corresponding to the command that has just been executed, and, on the other hand, blindly in the memory spaces allocated to the command sources situated in other configurations. The invention applies notably to instrumentation in aerodyne cockpits.