Officers at a military installation were being lectured about a new computer. The training officer said the computer was able to withstand nuclear and chemical attacks.

Suddenly, he saw that one of the officers had a cup of coffee and yelled, ???There will be no eating or drinking in this room! You??™ll have to get rid of that coffee.???

The officer said meekly, ???Sure, but why????

???Because a coffee spill could ruin the keyboard.???