The computer seems to have stopped working when nothing about the screen techniques to explain their state. Often the only real answer would be to restart the computer when this happens. You can tell if you computer has frozen if the cursor will not move when you move the mouse an input device.
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Martin Cooper (inventor) Inventing handheld cellular mobile phone Making world’s first handheld cellular mobile phone call. Martin “Marty” Cooper (born December 26, 1928) is an American engineer.