Data processing apparatus; computer programmes (programs), recorded; computer software (recorded); computer software, recorded; processors (central processing units); computer programs (downloadable software); intercommunication apparatus; electro-dynamic apparatus for the remote control of signals; electro-dynamic apparatus for the remote control of signals; modems; optical communication devices; network communication devices; current rectifiers; relays, electric; inverters (electricity); transducer; electric installations for the remote control of industrial operations; electric installations for the remote control of industrial operations; electric apparatus for commutation; power station automation equipment