As the mobile communication technologies have experienced a great progress in recent years, mobile computing systems and sustainable informatics technologies have become an integral part in our daily lives.The recent tremendous development in these technologies ranging from mobile edge computing devices, to personalized, embedded and sustainable applications. The International Conference on Mobile Computing and Sustainable Informatics (ICMCSI 2020) organized by Department of Computer and Electronics Engineering, IOE, Tribhuvan University, Nepal on 23-24 January 2020 has significantly contributed to address the unprecedented research advances in the areas of mobile computing and sustainable informatics.