Electronic apparatus and instruments for the monitoring of performance of component parts of vehicles for locomotion by land; remote electronic sensors; computer hardware; computer software; computer programs; electronic diagnostic monitoring apparatus and instruments; electronic diagnostic testing equipment; data communication hardware; data communication transmitters; wireless communication apparatus; monitors for use in the measurement of energy usage; monitors for use in the measurement of efficiency in electrical and mechanical equipment; monitors for use in the measurement of parameters including, stress, strain, displacement, temperature and humidity on machinery and / or electronic equipment and apparatus; electronic wear monitors for mechanical equipment; electronic wear monitors for electrical equipment; telemetry measurement apparatus and instruments; computer hardware in the form of diagnostic hubs; electronic motor controllers; weighing, measuring, signalling, checking apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating and controlling electricity; apparatus for recording, transmission or reproduction of data.;