9 scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking in the nature of supervision, life-saving and teaching apparatus and instruments, namely, indicate specific items by common commercial name; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, indicate specific items by common commercial name; apparatus for recording, transmission or reproduction of sound or images, namely, indicate specific items by common commercial name; blank magnetic data carriers and blank recording discs; compact discs, DVDs and other digital recording media featuring indicate subject matter e.g. music; mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; computer software for specify the function of the programs, e.g., use in database management, use as a spreadsheet, word processing, etc. and, if software is content- or field-specific, the content or field of use; fire extinguishing apparatus