Publication

http://en.wikipedia.org/wiki/Publication
"To publish is to make publicly known, and in reference to text and images, it can mean distributing paper copies to the public, or putting the content on a website.
The word publication means the act of publishing, and it also means any writing of which copies are published, and any website. Among publications are books, and periodicals, the latter including magazines, scholarly journals, and newspapers.
Computers and the internet have changed the face of publishing, lowering the cost, and allowing more people to publish, through both desktop publishing and internet publishing."

From reading the wikipedia definition it makes me ask the question of whether this includes spoken word. Could a publication include a radio or tv show in which information is made public? In terms of written word, the term publication reminds me of Berlin graffiti layered walls in which personal symbolic information was made public on the walls.