publisher

noun

1. A person or (especially) a company who publishes, especially books.

   “All a publisher has to do is write cheques at intervals, while a lot of deserving and industrious chappies rally round and do the real work.”

2. A system or component that allows other components (subscribers) to receive notifications of something, such as an event.
3. A preacher who is a Jehovah's Witness.