Francesco M. Donini got a Ph.D. degree in Computer Science at Sapienza University of Rome in 1992, where he worked as Assistant Professor till 1998. He worked at Politecnico di Bari as an Associate Professor from 1998 to 2002, and is now a Full Professor in Computer Science & Engineering at Universita’ della Tuscia – Viterbo, Italy. His main scientific interests are in Theory (Knowledge Representation in Artificial Intelligence; Algorithms and computational complexity of problems related to deduction in various logics) and in Applications (Intelligent Image retrieval, matchmaking in electronic marketplaces, negotiation, Semantic Web), and recently, in Explanation in Recommender Systems. His publications amount to more than 130. On 1991 the paper “Tractable Concept Languages”, published in the proceedings of the Int. Joint Conf. on Artificial Intelligence (IJCAI-91) received the Best Paper Award. The paper deals about computational complexity in description logics. In 2005, the paper “Concept Abduction and Contraction for Semantic-based Discovery of Matches and Negotiation Spaces in an E-Marketplace”, published in the proceedings of the Int. Conf. on Electronic Commerce (ICEC-05) received the Best Paper Award. He was PC Chair of the conferences: 1a) AICA-2002 (Conf. of the Italian Association for Informatics and Automated Calculus, Bari, Italy 2002) 1b) RDRC-06 (Resource Discovery Retrieval and Composition), Special Track of the ACM Symposium on Applied Computing, SAC Dijon, France 2006 1c) 1st Int. Works. on Semantic Matchmaking and Resource Retrieval: Issues and Perspectives” SMR 2006, Seoul, Korea – September 11, 2006. He served as a PC member of many International AI conferences, among which IJCAI (1999,2003,2009,2011,2019 blue ribbon,2020), and ECAI (2010, 2014, 2020). Since 2008 he is member of the Editorial Board in the “Journal of Universal Computer Science“; and more recently (oct.2020) “Data“.