Control and test apparatus and instruments in the aeronautical, space, industrial and transport fields; control and test apparatus and instruments for beams, electrical harnesses, electrical wiring, onboard or not especially on autonomous or rail-mounted land vehicles, surface marine or river craft, submarines, aircraft and spacecraft, satellites, especially through the generation and commutation of stimuli and the measurement of the effects of said stimuli; control and test apparatus and instruments for electrical continuity and insulation; apparatus for generating low and high voltages; control and test apparatus and instruments for electrical components (resistance, capacitor, diode); detectors; electric relays; diagnostic apparatus (not for medical purposes); data processing apparatus; computers, peripheral devices therefor, their subassemblies and component parts thereof; CPUs (central processing units), computer software for testing and maintenance of electronic and electrical systems and equipment fitted on land vehicles and watercraft, aircraft, spacecraft and missiles; remote-control devices for vehicles and equipment; electronic display boards; automatic control apparatus and instruments for testing electronic and electrical equipment and systems onboard or not on land vehicles, watercraft, aircraft, spacecraft and missiles; automatic test benches (checking apparatus and instruments) for testing electronic, electrical or avionic equipment; transmitting sets, electric cables; computer hardware, namely computers, microprocessors, computer peripheral devices, printers, computer software, for establishing reports of tests; computer hardware, namely computers, microprocessors, modems, for connecting test installations via telecommunication means and/or via the Internet and/or local area networks; instruments and installations for use in testing vehicles and apparatus for locomotion by land, air and sea