9 Apparatus, instruments, and modules for conducting, switching, transforming, accumulating, regulating, transmitting or controlling electricity including electrical cables, namely, power supply units, switch made power supplies, high frequency change-over switches, matching networks, electrical converters and inverters, frequency converters; apparatus, instruments, and modules for conducting, switching, transforming, accumulating, regulating, transmitting or controlling electricity with additional components of fluid technology, namely, power supply units, switch made power supplies, high frequency change-over switches, matching networks, electrical converters and inverters, frequency converters; apparatus for recording, transmitting and reproducing of sounds and images; magnetic recording media, namely, blank magnetic computer tapes, blank magnetic data carriers, blank magnetic tapes for tape recorders; data processing equipment, namely, data processors; computer software for providing functional descriptions and/or for partly automated generation of electrical and circuit diagrams of fluid technology; data base management software for designing, drafting, dimensioning and/or controlling electrical cabinets; switch cabinets sold as a unit with electronic modules for plant machinery controller; electronic control systems for machines consisting of operating and control units and desks, especially for machines; lasers, not for medical purposes and their constructionally linked parts, namely, optical mirrors, optical lenses; switch cabinets of metal