Different types of personal assistants

Dear all,

in the last session we wer discussing around the term "Intelligent 
Personal Assistant" and found that this might be already too specific, 
but that multiple variants of assistants should be out there. One aspect 
of it might be the way data is handled. In publications we usually see 
different wordings and sometimes a definition what is understood by 
that. A general terminology might be missing. Hence we were thinking to 
ask our community here to help us with that.

So far we were discussing

  * Personal assistant
      o An assistant that knows you but does not represent a company,
        Like Siri, Google Assistant, Bixby, ...
  * Enterprise assistant
      o An assistant representing a company or service, like an
        assistant for your bank, school, neighborhood association,...
  * Public assistant
      o An assistant that is publicly available and does not need your
        data to work, like a smart city assistant
  * Embedded assistant
      o An assistant that has all you data locally
  * ...

Do you have any thought on that? Is there maybe already such a 
categorization available that we are not aware of?

Dirk