Configurable computer input device

摘要

An accessory device for a computer system, comprising a casing (30) with an openable apertured lid (32) beneath which an overlay (36) can be inserted to cover membrane switches (34), the overlay being marked on its front face with switch operating areas in use exposed through the aperture in the lid and bearing a bar-code on its back readable by a bar-code scanner (38) within the accessory device in order to configure the switches for enabling easier control of a particular program running on the computer to which the overlay card has been tailored. (Figure 3)