96 ITU‐T's Technical Reports and Specifications Ref. No. Category Definitions/Features Key concept/ Keywords Source 76 ITU ICT spans across a number of application sectors that characterize the framework of smart sustainable cities. Among others, energy, buildings, transport and mobility, water and waste management. ICT, sustainability, energy, buildings, transport, mobility, water management, waste management. FG‐SSC‐0020 (2013) 77 ITU \"A Smart Sustainable City has been defined as a 'knowledge', 'digital', and 'cyber' or 'eco' city; representing a concept open to a variety of interpretations, depending on the goals set out by a Smart Sustainable City's planners. We might refer to a Smart Sustainable City as an improvement on today's city both functionally and structurally, using information and communication technology (ICT) as an infrastructure. Looking at its functions as well as its purposes, a Smart Sustainable City can perhaps be defined as \"a city that strategically utilizes many smart factors such as Information and Communication Technology to increase the city's sustainable growth and strengthen city functions, while guaranteeing citizens' happiness and wellness.\" ICT, strategic resource utilization, sustainability, growth, services, citizen happiness, citizen wellness. Hwang et al. (2013)78 Magazine Smart sustainable cities use information and communication technologies (ICT) to be more intelligent and efficient in the use of resources, resulting in cost and energy savings, improved service delivery and quality of life, and reduced environmental footprint –all supporting innovation and the low‐carbon economy. ICT, cost efficiency, energy efficiency, energy savings, quality of life, environment, improved service delivery, innovation, low carbon economy. Cohen (2011)