Fibre optic apparatus; fibre optic cables, fibre optic instruments (not for medical purposes), fibre optic link installations, fibre optic panels, periscopes, receptors, terminals, viewers (not for medical purposes), elements, fibre optics, fibre optic communication installators and apparatus for use with computers and/or electronic apparatus and instruments, optical fibre components and apparatus, optical connectors, optical couplers, optical electronic components, variable optical fibre attenuators, fibre optic protection switches, fibre optic polarizers, optical fibre polarization controllers, fibre optic raman depolarizers, fibre optic depolarizers and parts and fittings for all the aforesaid goods