The article "Sustainable-Smart-Resilient-Low Carbon-Eco-Knowledge Cities: Making sense of a multitude of concepts promoting sustainable urbanization" by Martin de Jong, Simon Joss, Daan Schraven, Changjie Zhan, and Margot Weijnen explores the various categories of cities that have emerged in the policy discourse, such as "sustainable cities," "green cities," "smart cities," and "eco-cities." The authors investigate these concepts through a comprehensive bibliometric analysis to understand their individual and interrelated conceptual perspectives. They hypothesize that while there may be some overlap and cross-fertilization among these categories, each category has distinct conceptual perspectives that influence how they are understood and applied in policy. The study uses Scopus as a data source to analyze 1430 academic articles, focusing on the frequency of occurrence, co-occurrence, and connections with other key disciplinary terms. The results show that "sustainable city" is the most frequently occurring and conceptually central category, followed by "smart city," "digital city," "eco city," and "green city." "Low carbon city," "knowledge city," and "resilient city" are also significant, while "intelligent city," "ubiquitous city," "liveable city," and "information city" are less prominent. The article discusses the historical genesis and evolution of these categories, highlighting their theoretical underpinnings and practical implications. For example, "sustainable city" is rooted in the concept of sustainable development, emphasizing the interrelationship between economic, social, and environmental sustainability. "Eco city" focuses on ecological sustainability, while "low carbon city" addresses the need to minimize carbon emissions. "Smart city" is characterized by advanced technology and information systems, and "knowledge city" emphasizes the importance of knowledge and innovation. The findings suggest that while some categories share commonalities, they also have distinct conceptual perspectives and implications for urban development and regeneration. The authors conclude that a nuanced understanding of these categories is necessary to effectively address the challenges and opportunities of sustainable urbanization.The article "Sustainable-Smart-Resilient-Low Carbon-Eco-Knowledge Cities: Making sense of a multitude of concepts promoting sustainable urbanization" by Martin de Jong, Simon Joss, Daan Schraven, Changjie Zhan, and Margot Weijnen explores the various categories of cities that have emerged in the policy discourse, such as "sustainable cities," "green cities," "smart cities," and "eco-cities." The authors investigate these concepts through a comprehensive bibliometric analysis to understand their individual and interrelated conceptual perspectives. They hypothesize that while there may be some overlap and cross-fertilization among these categories, each category has distinct conceptual perspectives that influence how they are understood and applied in policy. The study uses Scopus as a data source to analyze 1430 academic articles, focusing on the frequency of occurrence, co-occurrence, and connections with other key disciplinary terms. The results show that "sustainable city" is the most frequently occurring and conceptually central category, followed by "smart city," "digital city," "eco city," and "green city." "Low carbon city," "knowledge city," and "resilient city" are also significant, while "intelligent city," "ubiquitous city," "liveable city," and "information city" are less prominent. The article discusses the historical genesis and evolution of these categories, highlighting their theoretical underpinnings and practical implications. For example, "sustainable city" is rooted in the concept of sustainable development, emphasizing the interrelationship between economic, social, and environmental sustainability. "Eco city" focuses on ecological sustainability, while "low carbon city" addresses the need to minimize carbon emissions. "Smart city" is characterized by advanced technology and information systems, and "knowledge city" emphasizes the importance of knowledge and innovation. The findings suggest that while some categories share commonalities, they also have distinct conceptual perspectives and implications for urban development and regeneration. The authors conclude that a nuanced understanding of these categories is necessary to effectively address the challenges and opportunities of sustainable urbanization.