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X-Clacks-Overhead
Information on the X-Clacks-Overhead transmission header.
X-Clacks-Overhead is a non-standardised HTTP header based upon the fictional work of the late, great, Sir Terry Pratchett. At the time of writing, Mozilla.org (makers of the Firefox web browser), the makers of Debian (a popular Linux Operation System), and Xml.com (a major repository of standards information) are examples of some of the backbones of the Internet who transmit the Signal "GNU Terry Pratchett". The Internet news website The Register also transmits headers to commemorate both Sir Terry Pratchett and one of their staffers; Lester Haines.
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