Fourth International Conference on Big Data and Computational Intelligence (ICBDCI’21) in conjunction with 6th IEEE International Conference on Computing, Communication and Security (ICCCS-2021) will be held in Las Vegas, USA on 04-06 October 2021. The three-day conference will include invited keynote and oral presentations. ICBDCI will provide a forum for researchers and engineers in both academia and industry to exchange the latest innovations and research advancements in Innovative Computing, Communication and Engineering. ICBDCI also provides the attendees the chances to identify the emerging research topics, as well as the future development directions. Prospective authors are invited to submit full (original) research papers; which are NOT submitted or published or under consideration anywhere in other conferences or journals.