You try to find the Door Open button but the elevator closes.

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Clarke have popularized the idea of a space elevator, there are still a few kinks that need to be worked out before we start having folks hit the "door close" button for a 100, 000 kilometer (62, 000 miles) ride.

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The optical door flips open when the eject button is pressed to protect the drive from dust and potential damage when not in use.

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That wire can ground a contact on the circuit board behind the light that triggers a function intended to allow the door to be opened with a remote button, bypassing all its security measures.

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That space is home to the button controlling the drop-down door (much more on that later, of course).

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The slim door handles of the five-door vehicle are fully recessed, emerging at the touch of a button.

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Smartphone-controlled products like LED lightbulbs and door locks are helping us control our homes with the click of a button.

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Mercedes-Benz, for example, has programmed cars to stop and go into Park when the door is opened, no matter whether the driver has correctly engaged the Park button used on certain shifter stalks.

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