This book constitutes the proceedings of the 24th International Conference on Descriptional Complexity of Format Systems, DCFS 2022, which was supposed to take place in Debrecen, Hungary in August 2022. The 14 full papers presented in this volume were carefully reviewed and selected from 17 submissions. The book also contains 4 invited talks. The conference focus to all aspects of descriptional complexity including Automata, grammars, languages, and other formal systems; various modes of operations and complexity measures.

This book constitutes the proceedings of the 23rd International Conference on Descriptional Complexity of Format Systems, DCFS 2021, which was supposed to take place in Seoul South Korea in June 2021, but the conference was canceled due to the COVID-19 crisis.The 16 full papers presented in this volume were carefully reviewed and selected from 21 submissions. The conference focus to all aspects of descriptional complexity-the costs of description of objects in various computational models such as Turing machines, pushdown automata, finite automata or grammars.

This book constitutes the refereed proceedings of the 21st InternationalConference on Implementation and Application of Automata, CIAA 2016,held in Seoul, South Korea, in July 2016. The 26 revised full papers presented were carefully reviewed and selected from49 submissions. The papers cover a wide range of topics including characterizations of automata, computing distances between strings and languages, implementations ofautomata and experiments, enhanced regular expressions, and complexity analysis.