1. That ‘internet of things’ thing.;Kevin;RFID J.,2009
2. Richard, T. History of digital cameras: From '70s prototypes to iPhone and Galaxy's everyday wonders. CNET. 〈https://www.cnet.com/tech/computing/history-of-digital-cameras-from-70s-prototypes-to-iphone-and-galaxys-everyday-wonders〉.
3. Size of smart cities the market worldwide in 2019 and 2030;Statista Search Department,2022
4. Projected revenue generated by companies in the global smart city from 2020 to 2025;Statista Search Department,2022
5. Number of Internet of Things (IoT) connected devices worldwide from 2019 to 2021, with forecasts from 2022 to 2030;Statista Search Department,2022