1. Assistant Professor, Department of Archival, Libraries and Information Studies, University of West Attica (UWA), Athens, Greece,
2. Software Engineer, ILSaS Department, Hellenic Academic Libraries Link, National Technical University of Athens, Athens, Greece
3. System Librarian, ILSaS Department, Hellenic Academic Libraries Link, National Technical University of Athens, Athens, Greece
4. Professor, School of Electrical Engineering and Computer Engineering, National Technical University of Athens (NTUA), Athens, Greece