The two-volume set constitutes the proceedings of the Third International Conference on Information Technologies and Their Applications, ITTA 2026, held in Baku, Azerbaijan, during April 2026.The 80 full papers and 9 short papers presented were carefully reviewed and selected from 240 submissions. They were organized in the following topical sections: Part I: Technical Means and Tools of Information and Communication Systems; ICT in Pattern Recognition; ICT in Automation and Control Systems; ICT in Decision-Making.Part II: ICT and Intelligent Systems in Sociology and Economics; Cybersecurity of Information and Communication Systems; ICT in Industry and Construction; ICT in Modeling and Simulation.

The two-volume set constitutes the proceedings of the Third International Conference on Information Technologies and Their Applications, ITTA 2026, held in Baku, Azerbaijan, during April 2026.The 80 full papers and 9 short papers presented were carefully reviewed and selected from 240 submissions. They were organized in the following topical sections: Part I: Technical Means and Tools of Information and Communication Systems; ICT in Pattern Recognition; ICT in Automation and Control Systems; ICT in Decision-Making.Part II: ICT and Intelligent Systems in Sociology and Economics; Cybersecurity of Information and Communication Systems; ICT in Industry and Construction; ICT in Modeling and Simulation.