Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking and supervising, life-saving and teaching apparatus and instruments, namely, cameras, videocameras, video-audio recorders, TV cameras, handheld mobile digital electronic devices for the sending and receiving of telephone calls, electronic mail, and other digital data, for use as a digital format audio player, and for use as a handheld computer, personal digital assistant, electron...