This book constitutes the proceedings of the 4th Latin American Conference on High Performance Computing, CARLA 2017, held in Buenos Aires, Argentina, and Colonia del Sacramento, Uruguay, in September 2017.The 29 papers presented in this volume were carefully reviewed and selected from 50 submissions.

This book constitutes the refereed proceedings of the 5th Ibero-American Congress on Smart Cities, ICSC-Cities 2022, held in Cuenca, Ecuador during November 28–30, 2022.The 17 full papers included in this book were carefully reviewed and selected from 116 submissions. They were organized in topical sections as follows: computational intelligence and urban informatics for smart cities, Internet of things, optimization, smart production, and smart public services and smart monitoring and communications