Four - a mechanical engineer, a chemical engineer, an electrical engineer and a computer engineer - were traveling in a car when, suddenly, the engine died. "Sounds to me as if the pistons have seized. We`ll have to strip down the engine before we can get the car working again," said the mechanical engineer. "Well," said the chemical engineer, "it sounded to me as if the fuel might be contaminated. I think we should clean out the fuel system." "I think it might be a grounding problem," said the electrical engineer, "or maybe a faulty plug wire." All three turned to the computer engineer who had said nothing. "What do you think?" they asked. He replied, "Well, perhaps if we all get out of the car and get back in again...."