Jakob Nielsen, Web usability. Milano : Apogeo, 2000, p. 418; Michele Visciola, Usabilità dei siti web. Milano : Apogeo, 2000, p. 166

Review of: 1) Jakob Nielsen, "Web usability", 2) Michele Visciola, "Usabilità dei siti web". The term 'usability', present in both the texts, indicates the essential object of communication via the Internet and of its immediate future development, according to the authors: the easiness to understand and to use and, above all, the utility of a web site for users who surf on the Net