The product key is a 25-character code that is required to activate AutoCAD 2018. The product key for AutoCAD 2018 is:

In the context of software piracy, "Xforce" refers to a well-known group that creates "keygen" (key generator) and "patch" utilities. These tools are designed to bypass the software's built-in licensing service (LMTOOLS) by modifying the program's code or generating a fake activation code.