This proceeding of the third WebNet conference--WebNet 98--addresses research, new developments, and experiences related to the Internet, intranets, and extranets. The 265 contributions of WebNet 98 presented in this volume consist of the full and short papers accepted for presentation at the conference from a collection of more than 600 submitted from 40 countries. Included are position papers by leading experts in the field; descriptions of ideas and products; reports on concrete applications of the Web; discussions of the impact of the Web on various aspects of life; plus considerations as to how society might adjust to the resultant changes. Major areas covered at the conference include: (1) commercial, business, professional, and community applications; (2) educational applications; (3) electronic publishing and digital libraries; (4) ergonomic, interface, and cognitive issues; (5) general Web tools and facilities; (6) personal applications and environments; (7) societal issues, including legal, standards, and international issues; and (8) Web technical facilities. (AEF)