I had first used AutoCAD in the year 1992 when I was student of second year of Mechanical Engineering. Having drawn a number of drawing using the drawing board, using AutoCAD was a luxury for us. There was no need of scale, no compass, no protractor and nothing, there was this beautiful and easy to understand user interface of AutoCAD in front of us to make the drawings. We enjoyed drawing line, circles, arc etc and making the object drawings. Following the user interface of AutoCAD is very easy.
You can choose various tools from the top menu bar or the side bar or you can write the commands at the bottom of the window. You can easily give the dimensions in various forms and save the drawing. AutoCAD also supports a number of applications programming interfaces like AutoLisp, VisualLisp, VBA and .Net.
The latest version of AutoCAD is AutoCAD 2009 which has ribbon similar to Office 2007 that helps making the drawings and applying various features much faster. AutoCAD 2009 comes with a number of additional features.