Scientific, surveying, photographic, cinematographical, optical, weighing, measuring, signaling, checking, teaching apparatus and instruments, namely, cameras, sound and video recorders, computers, portable electronics, namely multimedia recorders; analog sound and video signal effects processors and conduits; apparatus for recording, transmission or reproduction of sound and images; blank magnetic data carriers, blank magnetic recording discs, blank compact discs, blank DVDs and other blank digital memory for recording sound, video, image, and other meta-data for storage and exchange; mechanism for coin-operated apparatus; cash registers, calculating machines, data processing equipment, computers; software for multimedia recording, creation, tracking, management, composition, exchange, and distribution of files containing music, video and multimedia; fire-extinguishing apparatus