accelerometers integrated with global positioning apparatus; accumulators, electric, for vehicles; active electronic labels containing coded information; analogue to digital converters; apparatus for data processing; apparatus for displaying the path followed by a vehicle; apparatus for displaying the position of vehicles; control modules for vehicles and vehicle systems (onboard; electronic sensors; fluid level sensors; level sensors; vibration sensors; vehicle tracking apparatus; fluid level measuring apparatus for use in motor vehicles; remote reading fluid level indicators; fuel level indicators; data transmitters; data compilations; data encoding apparatus; airwave encoded data information receivers; recorded data files; radio frequency identification readers (rfid readers); radio frequency identification tags (rfid tags); data processors; data processors for control of material supply; data processors for workshop controls; data logging apparatus; multiport controllers; data transmitting apparatus; data receivers; logs (measuring instruments); apparatus for use in data logging; apparatus for use in access control; liquid level meters; level gauges; instruments for measuring levels of fluids; sensing devices for the control of liquid levels (other than for medical use); liquid level monitoring apparatus; level controllers (electrical apparatus); vibration detectors; wireless transmitters; trackers (computer apparatus); mileage recorders for vehicles; mobile data instruments; satellite navigational apparatus; global positioning system (gps) apparatus; kilometre recorders for vehicles; travel distance monitors; vehicle location instruments; electronic location apparatus; data buffers; alarm signalling transmitters; alarm signalling apparatus; electronic measuring apparatus