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Internet of things (IoT) is emerging as an essential part of modern connected living environment. It is very much affecting our day to day lifestyles, businesses, social interactions and many more aspects of modern world. Due to the ubiquity of this technology, it needs a large number of sensors for its operations. The energy and bandwidth required for IoT are challenging issues. There are different versions of IoTs used in different application domains. For situations with limited resources, narrowband IoT (NBIoT) can be used. NBIoT is a leaner, greener, and more efficient version of IoT. It takes less power and bandwidth than other versions of IoTs. However, its functions are suitable for many different applications. Specifically for rural areas and large scale applications in resource limited scenarios, it is the first choice. In this article, we present the main features of NBIoT, its potential and applications across different …