ActiveDocs are nothing more than a VFP rich client desktop window running inside the IE browser, and you can run a form or VFP app outside of the IE browser just the same. The only real functionality of an ActiveDoc is that it hosts a VFP form within an IE window, and you still need the VFP runtime on the desktop to run it so it is not a thin client and it can't be compared to thin clients. Also, there are many security issues using ActiveDocs.