Electrical and electronic apparatus and instruments; electrical warning equipment and status sensors, light and infra-red barriers, ultrasonic and vibration transmitters and receivers, electrical signal centres, fire alarms, burglar alarms, alarm and signalling equipment; fire gas, gas, smoke, aerosol, flame and temperature detectors; anti-theft, anti-burglar and anti-assault devices; access-control units; signal transmission and indicating equipment; extinguishing gas containers; pressure reducing equipment and jets as part of fire extinguishing equipment; fire extinguishing equipment; combinations of the above mentioned units to form complete systems; thermionic tubes, indicator glow lamps, overvoltage arresters; computer software; parts of and accessories for all the above mentioned goods; and all other goods in this class