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"While the Old-timers accurately foresaw much of today's common technology, they missed the boat in two important areas: user interface, and implications of Moore's law"
Not so. Regarding UI: In As We May Think (1945), Vannevar Bush described an interface that is stunningly recognizable as web browsing. Doug Engelbart's work in the '60s (from which sprang the GUI, as Phil mentioned) was single-mindedly focused on providing the best user interface for what he called "knowledge workers". Some of his UI features, such as those for condensing text passages for quick skimming, are still unmatched. Direct manipulation showed up in Ivan Sutherland's Sketchpad (1963), whose constrained drawing features are also still unmatched. Windowed UI and WYSIWYG editing came with the email@example.com