Officers at a military installation were being lectured about a new computer. The training officer proudly pointed out that the computer was able to withstand nuclear and chemical attacks.
Suddenly, he noticed that one of the officers had a cup of coffee in his hand. "There will be no eating or drinking in this room!" he yelled. "Get rid of that coffee, immediately!"
"Yes, sir," the officer replied meekly. "but, why?"
"Because a coffee spill could ruin the keyboard!"