9 Signal devices, in particular, acoustic, optical and radio signal generators, electric warning lights, winking indicator lights and flashing safety lights, signal pillar in the nature of electric warning light systems, electric buzzers, electronic warning horns, sirens, signaling and warning bells, radio elements as accessory for signal devices, namely, radio transmitters, receivers and transceivers, data processing apparatus and computer, in particular, digital computer, technical, electric and electronic instruments for data processing and data storage, namely, data processors to signal, diagnose and/or indicate the operational state of machines; computer hardware and spare replacement parts for the foregoing data processing devices and computer, technical, electric and electronic instruments for data processing and data storage to signal, diagnose and/or indicate the operational state of machines; computer monitors; computer printers for printing documents; data processing apparatus with recorded operating computer programs sold as a unit; downloadable and recorded computer software and programs for use in monitoring and operating warning light systems to diagnose or signal the operational state of machines