An interface is the point of communication between user and system, allowing for input to the system and feedback to the user.

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North American electrical outlet, why so sad?

I wasn't sure whether it was more appropriate to post here or rather on electronics SE, but please bear with me... Why was the 120 VAC outlet and the pinout of the plugs shaped the way they are? ...
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Java GUI - JLIST + Refresh

I need to create an interface which includes a list of events. The events are saved into a Vector List and I need to be able to display a list of their 3 variables like this: 13/05/2003 Task 1 ...