An apparatus having a memory and an operating system running a plurality of applications that are controlled by user signals, means to register the user signals required by each application, means to receive user signals, and means to send each received user signal to the application registered to require that signal. A method of passing user signals to a plurality of applications running with an operating system comprising receiving from each application information on user signals required by that application; saving in a memory the required user signals associated with each application; receiving a user signal from a user interface device; retrieving from the memory applications that require the received user signal; and sending the received user signal to each of the retrieved applications.