We sincerely invite you to participate 2025 the 9th International Conference on Cloud, Big Data and Communication Systems. It'll be held at University of Manchester, Manchester, United Kingdom during August 14-16, 2025. The goal is to establish an international forum for engineers and scientists to present their ideas and experiences in the fields of Cloud and Big Data Computing like we always do. The ICCBDCS 2025 topics include but are not limited to the following. Authors are encouraged to submit unpublished original research works in one of the following topics