# Clustering Smart City Services: Perceptions, Expectations, Responses
## 2 Literature Review
Additionally, information and communication technologies in the context of smart cities research should take care of justice and equal treatment of all human entities, and by any means should not promote exclusion and must promote inclusiveness and social responsibility. One more feature of smart cities technology is that it must be flexible, open and extendable and should be deployed with the justification of resources and costs consumed. The adoption of ICT should be creative, promote collaboration and integration of ideas, beliefs, and opinions. Finally, yet importantly, ICT for smart cities research should build bridges between social, cultural and other gaps of citizens and capitalize on diversity. Given the previous communication of features for smart cities technologies in the next section, we set up the context and the basis of our research model and investigation. From a huge, diverse and complementary literature review and industry review of ICTs and platforms, we conclude by _six combined clusters of technology enablers_ and fifty pilot applications of smart city innovations. The ultimate objective of our study is to analyze how real users of smart city applications perceive the value of core technologies and relevant services towards the quality of their lives. * Content Management systems
* Networking Technologies
* Data Warehouses & Distributed Systems
* Analytics and Business Intelligence
* Emerging Technologies
* Smart City Innovation Technologies  
In Figure 1, these clusters are highlighted. For our research, it is extremely important to link these clusters with value adding smart city services. The technology landscape is an evolving ecosystem. It is hard to try analyzing it in the context of a static snapshot at a given time. In Figure 2 below, we organized, based on our perceptions and extensive literature review, the key ICTs Technology Clusters of our times that enable and support  
Figure 1: Smart Cities enabling technologies. smart cities applications. We do believe that this is a meaningful overview that enables a dialogue for the vision of Smart Cities in our days. Content Management SystemsThe technological cluster of Content Management Systems (CMS) is a diverse and multifaceted domain. In most of the scenarios related to knowledge dissemination, or joint workflow management, CMS is a reliable and efficient technology. Different solutions and applications fall into this category; the dominant ones are those depicted in Figure 2:  
* Learning Management Systems (LMS),
* Document Servers,
* Workflow Systems,
* Collaboration Platforms,
* Micro-content Systems. Networking TechnologiesThe evolution of Computer Networks technologies and its convergence with Telecommunications was probably one of the most recent influential integrations. Computing and Telecommunications can be seen now as an integrative whole which enriched the user experience with several services and unique experiences permitting innovative thinking on the domain. It seems that there is no limit anymore for the development of channels for the distribution of information. * Distributed Sensor Networks/Systems (DSN)  
Figure 2: Information and Communication Technology clusters for Sustainable Smart Cities applications (the Authors). * Wireless and Broadband,
* Satellite Communication,
* Social Networks,
* Mobile Platforms. _Data Warehouses & Distributed Systems_: Our society is a data-driven society. A variety of data are generated, stored and used in different infrastructures and schemas. Additional value is generated by a sophisticated transformation of data to insights. Advanced decision making and managerial support can be performed. One of the greatest challenges of our times is to manage consistent information in a timely and accurate manner. Big Data research is a new paradigm for the processing of data without direct human intervention.