Scientific (other than medical), nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving (rescue) and teaching apparatus and instruments; apparatus and instruments for conducting, distributing, transforming, accumulating, regulation or control of electric current; apparatus for recording, transmitting, reproducing or processing sound or images; magnetic data carriers, recording discs or read-only memory disks; floppy di...