About THUERING M
About Univ. Cologne
About HANNEMANN J
About Univ. Cologne
About HAAKE J M
About German National Res. Center for Computer Sci.
About Communications of the ACM (Association for Computing Machinery)
About hyper-media
About WWW【情報サービス】
About Other computer utilization technology
About Man-machine system
About ハイパーメディア
About 認知
About 理解
About 設計