Interactivity, computation and distribution are the three main distinctions between the Internet and the authorative content of TV, Print and Radio.
The following is a chart showing aspects of interactivity with examples. These are ordered by general purpose going from simple navigational interactivity for consumption at the bottom to enhanced interactivity for creation at the top. There is often a blend of these aspects, for instance, you select and move a collage piece as you organize it. The scale shows tendencies.
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Inventor Dan Zen