9 Scientific, nautical, surveying photographic, cinematographic, optical, weighing, measuring, signaling, checking supervision, life-saving and teaching apparatus and instruments, namely, apparatus and instruments for controlling and commanding trains and the flow of trains in the nature of a train control system used in the railway industry for detecting and controlling trains, ground faults, broken rails, power failures, track switches and lights; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electricity limiters, electricity conduits, electricity router for managing and optimizing energy loads within a building and electrical switches; Apparatus for recording, transmission or reproduction of sound or images; Pre-recorded magnetic recording media and sound recording disks in the nature of pre-recorded CDs, phonograph records and laser disks featuring music; Mechanisms for coin-operated apparatus; Cash registers, calculating machines and data processing equipment; Fire extinguishers