This volume contains the proceedings of the 2023 iteration of the ISPGAYA conference, titled "Digital Sustainability: Inclusion and Transformation" and held in Vila Nova de Gaia, Portugal. The conference and resulting book intend to explore the involvement of Portugal, a country on the semi-periphery of the world system, in developments regarding the understanding of and progress toward sustainability. The conference was organized by ISPGAYA, an institution belonging to the private polytechnic higher education system in Portugal, and brought together participants from around the world. This volume intends to establish a milestone in the multidimensional approach to the theme of sustainability, affirming the concept's multi and interdisciplinary nature and bringing together scholars across disciplines.