X-Clacks-Overhead and GNU Terry Pratchett
So farewell Sir Terry Pratchett. Since I first read The Colour Of Magic in 1983 you made me smile, you made me laugh out loud and above all, you always made me think.
In 2004's Going Postal, Terry wrote about the clacks, a series of semaphore towers that were the Discworld equivalent of the old telegraph system. There was a tradition that when a clacks worker dies in the line of duty, their name would be sent home by being transmitted up and down the line in the signalling layer of the clacks message protocol.