A programming language is like a natural, human language in that it favors certain methaphors, images, and ways of thinking.
Seymour PapertUntil very recently, most knowledge was inaccessible to people who couldn't read text. But this is changing. The computer opens up other channels of gaining knowledge. If someone is blind, we now have very good machines that will read to him. If someone can't recognize letters, he also will have access to knowledge through sound and images.
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