The document seeks, from a comparative analysis between the various projects presented, to give specialists and general public knowledge in an area considered extremely important for the development of contemporary societies. The scientific coordination is by Gustavo Cardoso, Vania Baldi and Vitor Tomé. The researcher Vitor Tomé (Universidade Autónoma de Lisboa, CIES-ISCTE-Instituto Universitário de Lisboa) is one of YouNDigital's consultants.