Autodesk released AutoCAD 2018 last month. You should see the product now in your Autodesk account, and probably you already installed it. The 1st version of AutoCAD was released in December 1982; it means 2018 version released 35 years after the 1st version.
What is the oldest version of AutoCAD that you ever used? I started using AutoCAD since R14, but I’ve seen R12 and R13 on several occasion back then.
Shaan Hurley managed to run AutoCAD 2.18 (not 2018) on a virtual machine. It is interesting to see how the software that is used by most engineers 30 years ago. Probably we can appreciate how the software works now. This version doesn’t even have UNDO! (it was introduced in R2.5)