42 Planning, design and implementation of computer technologies for others, namely, planning, design, and development relating to data and voice communication systems, audio-visual and web conferencing systems, security systems, digital signage and dynamic visual messaging systems, and network cabling systems; monitoring of computer systems by remote access to ensure proper functioning in the field of data and voice communication systems, audio-visual and web conferencing systems, security systems, digital signage and dynamic visual messaging systems, and network cabling systems; technical support services, namely, troubleshooting in the nature of diagnosing of problems with technology systems hardware and software in the field of data and voice communications systems, audio-visual and web conferencing systems, security systems, digital signage and dynamic visual messaging systems, and computer networks and cabling systems