The Three D's
"Engineers, inventors, and designers produce drawings as part of their creative process. They draw to work out and refine concepts and details. They draw to persuade. They draw to give direction. And they draw to record their ideas and to learn from others.
"This exhibition presents examples of industrial drawings in the collections of the National Museum of American History and the Smithsonian Institution Libraries."
The site is called "Doodles, Drafts & Designs." Someday you may find yourself in creating drawings just like these.