9 Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments, namely, avionic sensor systems, namely, navigation systems, altitude indicators, airspeed sensors, proximity sensors, electric sensors, and electronic monitors and electronic connection cables for earthing; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity, namely, electricity and fluid management devices comprised of ground segment and flight segment embedded hardware; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, software, or analog recording and storage media, namely, recorded and downloadable computer software for flight and ground operations of aircraft and aircraft engines; computers and computer peripherals; fire-extinguishing apparatus; software for computers, namely, recorded computer software for flight and ground operations of aircraft and spacecraft for use in the aerospace, transportation, and hydrogen delivery and storage industries