9 Scientific, optical, weighing, measuring and checking apparatus and instruments, namely, calculators, test beds being electronic apparatus for testing of motors and engines, pressure sensors, electro-optic transducers; electrical and electronic apparatus and instruments, namely, potential calculators, calculators for digital regulation of speed and fuel flow for use as digital engine controllers, and calculators for braking, temperature, pressure, vibration analysis and flight control; electrical, electronic and magnetic sensors for measuring pressure, speed, displacement, temperature, position, and vibration; electronic circuit cards for processing parameters; electronic systems and equipment for acquiring and processing data, namely, flight computers for use on and off board; calculation and operating software for simulating, running and storing other software test programs; monitoring systems comprised of computer hardware and software for evaluating the security, performance, and maintenance and servicing requirements of aircraft engines, aircraft engine parts, and aircraft engine modules; electrical and electronic devices and equipment for maintenance and monitoring, namely, portable computers for reading and interpreting data from other computers and sensors for use on board aircraft or with aircraft engines, test benches, or ground interventions; apparatus for recording, transmission, reproduction of sound, images and/or data; computer programs and software that enable the user to access data related to aircraft engines and the operation, maintenance, servicing, and repair of aircraft engines, aircraft engine modules, and aircraft engine parts; electric wires; electric cables; electric industrial cables; fireproof electric cables; electric telecommunications cables; fiber-optic cables; optical fibers; connection equipment for electric and optical cables, namely, cable connectors; electric power distribution units; electric converters; protection sheaths for electric cables and connectors; electric switches; circuit breakers; electrical components in the nature of electric contactors; transformers; current converters and rectifiers; electric apparatus for measuring, checking and signaling, namely, electric meters, electric circuit testers, electric multimeters; electric couplings; electric accumulators; electric igniting apparatus for igniting at a distance, namely, remote control starters for vehicles; electricity cabinets, namely, electrical terminal boxes; electric and electronic devices for vehicle equipping, namely, electric sensors, data conditioners being data processors, connectors, computers, computer software, all for reading and interpreting data from calculators and other sensors fitted on aircraft or engines; test benches, namely, electronic apparatus for testing of motors and engines