This book constitutes the refereed proceedings of the 26th IFIP WG 6.1 International Conference on Distributed Applications and Interoperable Systems, DAIS 2026, held in Urbino, Italy, during June 8-12, 2026, as part of the 21st International Federated Conference on Distributed Computing Techniques, DisCoTec 2026.The 7 full papers included in the proceedings were carefully reviewed and selected from 17 submissions. They were organized in topical sections as follows: Distributed Machine Learning and Storage and Distributed Systems.

This book constitutes the refereed proceedings of the 26th IFIP WG 6.1 International Conference on Distributed Applications and Interoperable Systems, DAIS 2026, held in Urbino, Italy, during June 8-12, 2026, as part of the 21st International Federated Conference on Distributed Computing Techniques, DisCoTec 2026.The 7 full papers included in the proceedings were carefully reviewed and selected from 17 submissions. They were organized in topical sections as follows: Distributed Machine Learning and Storage and Distributed Systems.