32nd Release of AutoCAD

AutoCAD 2018 was just released, but did you know it was the 32nd release of AutoCAD and that its beta codename was Omega?

I maintain a list of all of these and a few more at: http://autodesk.blogs.com/between_the_lines/autocad-release-history.html 

AutoCAD Release History

2017 is the 35th year anniversary for both Autodesk and AutoCAD.

What is the oldest release of AutoCAD you started using?