We have successfully conducted four conferences. In our 1st event of STI 2019 gathered around 12 distinguished keynote speakers, 200+ authors, 100+ senior academicians, and 30+ industry practitioners from 20+ countries of the World. In our 2nd event of STI 2020 gathered around 12 distinguished keynote speakers, 290+ authors, 100+ senior academicians, and 30+ industry practitioners from 20+ countries of the World. In our 3rd event of STI 2021 gathered around 10 distinguished keynote speakers, 250+ authors, 120+ senior academicians, and 35+ industry practitioners from 23+ countries of the World. All accepted and registered full papers will be published in the conference proceedings and submitted to IEEE Xplore Digital Library, and among them, selected extended papers will be submitted to the scopus-indexed journals. Here, It is noteworthy to mention that our past conferences are published in the international conference series by Conference Publishing Services (CPS) and archived in the IEEE Xplore digital library."