This book constitutes the proceedings of the23rd International Conference on Embedded Systems, Cyber-physical Systems, & Applications, ESCS 2025,21st International Conference on Grid, Cloud, & Cluster Computing, GCC 2025,4th International Conference on Emergent Quantum Technologies, ICEQT 2025,22nd International Conference on Modeling, Simulation & Visualization Methods, MSV 2025,31st International Conference on Parallel & Distributed Processing Techniques & Applications, PDPTA 2025which were held as part of the 2025 World Congress in Computer Science, Computer Engineering, and Applied Computing, CSCE 2025, which took place in Las Vegas, NV, USA, during July 21-24, 2025.The ESCS 2025 and ICEQT 2025 Conferences received a total of 72 submissions, of which 15 papers were accepted. The MSV 2025 Conference received 41 submissions, of which 9 papers were accepted. And the GCC 2025 and PDPTA 2025 Conferences received a total of 121 submissions, of which 24 papers were accepted. The proceedings include 41 of the accepted papers from ESCS 2025, GCC 2025, ICEQT 2025, MSV 2025, and PDPTA 2025.