9 Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking, lifesaving and teaching apparatus and instruments, namely, cameras, chronographs for use as specialized time recording apparatuses, length measuring apparatus in the nature of a measuring wheel, electric length measuring devices in the nature of a measuring wheel, pressure measuring apparatus, document printers for use with computers; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; data processing apparatus; computer apparatus, namely, computers; blank compact disc; blank DVD discs; blank CD-ROM discs; data carrier containing machine data and data carrier featuring recorded software for machine control; downloadable interactive database management software for machine operation, machine control, machine service and machine spare parts