9 electrical and electronic connecting systems and clip-on electronic components and modules thereof, namely, holders for plug-in electronic circuits, electronic circuits with casings and electronic circuits without casings, plug-in electronic components for group transistors and resistors and conductors and circuit boards, and parts thereof; power supplies; voltage/current and current/voltage converters; sensor systems for machine tools, namely, auto focus sensors for laser and flame cutting for electric and electro-technical use; terminals being devices at which electrical connections are made for electronic and electro-technical use; terminal parts for electrical use, namely, terminal blocks, terminal strips, plug-in connectors and clip on electronic components, namely conductors and groupings of transistors and resistors; and accessories for terminal blocks, terminal strips, plug and socket connectors and electronic components, namely, end plates, partitions, covers, brackets, mounting rails, protective casings, test plugs, sockets, cross jumpers and identification tags and identification tag holders