CAD

Stands for "Computer-Aided Design." Also known by engineers and architects as the best invention of all time. Today, CAD software is used for pretty much all three-dimensional designing. It is much easier and quicker to turn an object into an electronic representation than to diagram one with a pencil and paper. Better yet, objects created with CAD are very accurate and can be changed instantly. After all, you can only erase so much on paper before it starts to smudge.