Lulu offers publishing services for

Lulu offers publishing services for self-publishers, for outside publishing companies, and for other businesses.[1] Lulu operates primarily in five different functions: (1) acts as a publishing company by offering the Published by Lulu option; (2) as a co-publisher working in conjunction with outside publishing companies; (3) a service-provider for publishing and printing needs of outside publishing companies; (4) a tool for self-publishers, and (5) a technology company.
Lulu's ordering-and-publishing system is automated and authors can communicate with Lulu exclusively via the Internet.
If the author elects to place items such as books, eBooks, calendars, etc. on Lulu's website "market place" then any registered Lulu user may make and pay for orders online. There is an additional process for books to be distributed beyond the website to outlets such as Amazon.com and Barnes and Noble.