The CSC 2025 Conference received a total of 210 submissions, of which 47 papers were accepted. The FCS 2025 Conference received 60 submissions, of which 9 papers were accepted. This volume includes 35 of the accepted papers from CSC 2025 and FCS 2025.
The papers were organized in topical sections as follows: Military and Defence Modeling and Simulation; Scientific Computing and Utilization of Artificial Intelligence; Quantum Computing, Security, and Applications; Scientific Computing, Distributed Processing, Optimization, Numerical Methods, and Applications; 21st International Conference on Foundations of Computer Science, FCS 2025; and Poster Research Papers.