The ENIAC was the first computer based on the concept of
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Proximity sensors are commonly used on mobile devices. When the target is within nominal range, the device lock screen user interface will appear, thus emerging from what is known as sleep mode . Once the device has awoken from sleep mode , if the proximity sensor's target is still for an extended period of time, the sensor will then ignore it, and the device will eventually revert into sleep mode .
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In 1942, physicist John Mauchly proposed an all-electronic calculating machine. ... The result was ENIAC (Electronic Numerical Integrator And Computer), built between 1943 and 1945—the first large-scale computer to run at electronic speed without being slowed by any mechanical parts.
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