Abstract: A universal computer control device for controlling an image on an image display device has a group of basic control signal input means for manipulating a displayed image and for relating the displayed image to the control device and optional control signals for controlling microhandlers and for simulating operation of various different devices such as aircraft, cars, bikes and sport equipment.

Abstract: Apparatus for magnetically erasing and writing data stored in human readable displays of product label. The product label includes a display area with magnetic particles which can be oriented by external magnetic field in shapes including human readable figures and symbols. The so oriented magnetic particles retain their position when the external field ie removed, thereby storing the recorded information in the form of the figures and symbols. A portable apparatus includes electrically controllable write magnets for writing the figures and symbols, and an electrically controllable erase magnet for erasing previously recorded figures and symbols. The controllable magnets are mounted in a write/erase head which is self-adapting to the surface of the label.

Abstract: A new type of payment card includes a magnetically controlled display for visually reading magnetically recorded information such as current balance or available service value of the payment card. The required electronic and mechanical interface can be added to existing payment card handling equipment.