Technologies and innovation : 9th International Conference CITI 2023 Guayaquil Ecuador November 13 16 2023 proceedings This book constitutes the refereed proceedings of the 9th International Conference on Technologies and Innovation CITI 2023 held in Guayaquil Ecuador during November 13 16 2023. The 20 full papers included in this book were carefully reviewed and selected from 51 submissions. They were organized in topical sections as follows: Machine Learning; Natural Language Processing and Semantic Web; Computer vision; and Knowledge based systems