Metcalfe’s departure rattled the PARC staff like a tremor on the San Andreas fault. This was not only because he was the first top computer scientist to quit PARC since its founding five years earlier. More important, his resignation provided the first hint that while they had buried themselves in their research Camelot, a whole new world had sprung up outside—and that it would welcome them and their knowledge. What they could not know was that in a very short time Metcalfe would be back.