This book constitutes the proceedings of the 23rd International Conference on  Implementation and Application of Automata, CIAA 2018, held in  Charlottetown, PE, Canada, in July/August 2018.The 23 regular papers  presented in this book together with 4 invited papers were carefully reviewed and selected from 39 initial submissions. The topics of the papers include state complexity of automata, implementations of automata and experiments, enhanced regular expressions, and complexity analysis.weiterlesen