โ Scribed by Jakob Nielsen
No coin nor oath required. For personal study only.
A model of computer-human interaction is presented, viewing the interaction as a hierarchy of virtual protocol dialogues. Each virtual protocol realizes the dialogue on the level above itself and is in turn supported by a lower-level protocol. This model is inspired by the OSI-model for computer networks from the International Standards Organization. The virtual dialogue approach enables the separation of technical features of new devices (e.g. a mouse or a graphical display) from the conceptual features (e.g. menus or windows). Also, it is possible to analyse error messages and other feedback as part of the different protocols.
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