The book presents the proceedings of four conferences: The 19th International Conference on Security & Management (SAM20), The 19th International Conference on Wireless Networks (ICWN20), The 21st International Conference on Internet Computing & Internet of Things (ICOMP20), and The 18th International Conference on Embedded Systems, Cyber-physical Systems (ESCS20). The conferences took place in Las Vegas, NV, USA, July 27-30, 2020. The conferences are part of the larger 2020 World Congress in Computer Science, Computer Engineering, & Applied Computing (CSCE20), which features 20 major tracks. Authors include academics, researchers, professionals, and students. Presents the proceedings of four conferences as part of the 2020 World Congress in Computer Science, Computer Engineering, & Applied Computing (CSCE20); Includes the tracks on security & management, wireless networks, internet computing and IoT, and embedded systems as well as cyber-physical systems; Features papers from SAM’20, ICWN’20, ICOMP’20 and ESCS’20.