In Going Postal, Pratchett came up with the idea of honoring the clacks (telegraph) personnel by keeping their name going up and down the telegraph forever. G - pass message on. N - do not log. U - at end of line, turn and pass back.

GNU Terry Pratchett is being buried in HTML code and used as a hashtag.

The best way to honor an author is to read their books. The better-than-best way is to bring their ideas into life.