If ease of use and low learning curve are the desired attributes of a good interface, then the ideal interface has to be an invisible one. No buttons to push, no menus to navigate, no commands to type. The machine, or the computer, deduces your requests from your normal gestures and natural language, then delivers the data confidentially to your eyes, for your eyes only. Sounds too far-fetched? Too Star Trek, too James Bond? Not at all. Such interfaces have been in the field, in operations for quite some time now. The headgear of a modern soldier, for example, is a networked computer disguised as a helmet.
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