Late one evening, a young executive was leaving the office when he saw the CEO of the company standing in front of a paper shredder with a piece of paper in his hand.

"Listen to me, son," said the CEO, "I have in my hand a very sensitive and important document. My secretary has gone for the night, so can you operate this thing for me?"

"No problem," said the young man. He turned the machine on, inserted the paper, and pressed the start button.

"You're a genius. How can I ever thank you?" said the CEO as his paper disappeared inside the machine. "I just need one copy."