37 Telecommunications industry infrastructure construction, installation, and maintenance services, namely, planning, laying out, constructing, installing, and maintaining external telecommunication systems, other than computer software, supporting global communications networks, electronic commerce, and related applications; telecommunications industry construction, installation, and maintenance services, namely, planning, laying out, installation, monitoring and maintenance of internal telecommunications systems, namely, internal voice, video, data, and computer hardware networks and systems; telecommunications industry installation and maintenance services for central offices, data storage centers, co-location facilities, web-hosting facilities and similar facilities, namely, planning, laying out and installing central office equipment; public service utility industry construction, installation, and maintenance services, namely, planning, laying out, constructing, and maintaining external telecommunication hardware networks utilized in the public service utility industries for the electrical and fiber optic industries; infrastructure construction, installation, and maintenance services in the field of traffic safety, namely, planning, laying out, constructing, installing, and maintaining traffic signals, lighting infrastructure, road signs, guardrails, and smart highways in the nature of driver information networks and systems and machine to machine telematics systems, other than computer software systems