[Stylist] Anyone Know?

[David Russell]

Hi Writers,

I learned something new as a writer yesterday from one of the FB
writing groups to which I belong. There are publishers, and there are
publishing services.  Lulu, for example, is said to be a publishing
service.
What would the difference be?
Is an author who uses a "publishing service" under self published
status, as if they had used Amazon or Smashwords?
Just curious. Thanks!
-- 
David Russell
david.sonofhashem at gmail.com