42 Custom design, design, and development of computer hardware and software, electronic telecommunications apparatus and instruments, optical apparatus and instruments, optical communication apparatus and instruments, optical transmitters and receivers, apparatus for the recording, transmission or reproduction of sound, images and data, imaging apparatus and devices, 3D imaging apparatus and devices, sensors and detectors, optical sensors and detectors, LiDAR (Light Detection and Ranging) sensors, controllers for sensors and detectors, coherent sensors, computer networks, microprocessors, telecommunications switches, data switches, data centre switches, unified fabric switches, optical switches, electronic switches, opto-electronic switches, optical modulators, passive optical components, optical multiplexers and demultiplexers, optical interconnects, integrated optical devices, integrated optical modules, integrated optical/electronic modules, semiconductor chips, semiconductor chipsets, computer chips, computer chipsets, photonic chips, photonic chipsets, silicon photonic chips, silicon photonic chipsets, hybrid optical/electronic chips, hybrid optical/electronic circuits, integrated circuits computer chipsets, lasers, photodetectors, avalanche photodetectors; consultancy, testing, research, advisory, and technical support services, all relating to the design and development of computer hardware and software, electronic telecommunications apparatus and instruments, optical apparatus and instruments, optical communication apparatus and instruments, optical transmitters and receivers, apparatus for the recording, transmission or reproduction of sound, images and data, imaging apparatus and devices, 3D imaging apparatus and devices, sensors and detectors, optical sensors and detectors, LiDAR (Light Detection and Ranging) sensors, controllers for sensors and detectors, coherent sensors, computer networks, microprocessors, telecommunications switches, data switches, data centre switches, unified fabric switches, optical switches, electronic switches, opto-electronic switches, optical modulators, passive optical components, optical multiplexers and demultiplexers, optical interconnects, integrated optical devices, integrated optical modules, integrated optical/electronic modules, semiconductor chips, semiconductor chipsets, computer chips, computer chipsets, photonic chips, photonic chipsets, silicon photonic chips, silicon photonic chipsets, hybrid optical/electronic chips, hybrid optical/electronic circuits, integrated circuits computer chipsets, lasers, photodetectors, avalanche photodetectors; providing technical information, technical support, design consultancy and design advisory services relating to all the aforesaid services