There are three engineers in a car. A mechanical engineer, an electrical engineer and a computer engineer. The car suddenly breaks down on the way.
The mechanical engineer gets down and examines the car thoroughly for about 20 minutes. “Surely, the problem is in the engine.”, he concludes.
The electrical engineer gets down and examines the car for about half an hour and victoriously says; “definitely there is a battery problem, we have to recharge the battery.”
Finally the computer engineer gets down to see what is wrong and checks the car for almost an hour and says: “Can you please reset the car?”