Source+1

"Mechanical drawing history." //Ehow//. Google, 17 June 2005. Web. 7 Sep. 2010. .


 *  "Mechanical or technical drawing have existed since mankind first began to build."
 *  ** "Throughout all of history, man has designed and constructed monumental feats of engineering using available technology." **
 *  "The Industrial Revolution (1760-1850) was a period during which many technological advances were developed."
 *  "Industrial and agricultural advancements in machinery and automated tooling emerged at an incredible rate."
 *  "In today's technology driven [|business] environment, most mechanical drawing is done by [|computer] ."
 *  "Though many industries may still rely on the occasional hand drawing, [|computer software] is the primary medium used today."
 *  "Programs which preform mechanical drawing functions include AutoCad, microstation, CorelDraw, Vector works or Adobe Illustrator."
 *  "The principal benefit of these programs is that an object, once drafted in the program, can be turned and rotated on any axis with the click of a mouse."
 *  "This allows a single illustration to be viewed from numerous angles."
 *  "The advent of linear three point perspective improved"