This book constitutes refereed proceedings of the 7th International Conference on Technologies and Innovation, CITI 2021, held in Guayaquil, Ecuador, in November 2021. The 14 full papers presented in this volume were carefully reviewed and selected from 36 submissions. They are organized in topical sections named: semantic technologies and machine learning; natural language processing; mobile and collaborative technologies; networks and IoT technologies; ICT for agronomy and environment.