Abstract: User input devices are provided having an input sleeve with an exterior surface and an interior surface shaped and sized to receive a core. A slide sensing system has a slide sensor positioned proximate to the interior surface that senses sliding movement of the input sleeve along a length of the core and causes a slide signal to be generated that indicates at least that the input sleeve has been moved along the length of the core and a direction of such movement along said core. A rotation sensing system has a rotation sensor positioned proximate to the interior surface that senses rotational movement of the input sleeve relative to the core and causes a rotation signal to be generated that indicates at least that the input sleeve has been rotated relative to the core. A processing system determines an output signal based upon the slide signal and the rotation signal.