Giuseppe Macario, PhD, is considered a leading expert in the study of 3D virtual environments. He authored several publications in Italian as well as in English on the history and applications of virtual worlds in different fields of culture and science (education, art, medicine, logistics, economics, management etc.), focusing on Second Life and its open source variant OpenSimulator/Hypergrid. Giuseppe Macario still holds two world records after solving problems from the ACM International Collegiate Programming Contest and is an Oracle Certified Professional. Macario works with Sapienza University (Rome), DolceVita Institute of Technology (Vatican City) and University of the People (California).