1) Computer network security
Found on
https://www.crosswordclues.com/clue/warchalking
Warchalking is the drawing of symbols in public places to advertise an open Wi-Fi network. Inspired by hobo symbols, the warchalking marks were conceived by a group of friends in June 2002 and publicised by Matt Jones who designed the set of icons and produced a downloadable document containing them. Within days of Jones publishing a blog entry ab...
Found on
http://en.wikipedia.org/wiki/Warchalking
the use of chalk symbols on the street to indicate where passers-by can access wireless networks. Coined by Matt Jones. Spawned blogchalking, pubchalking, chalkchalking (coined by Graybo)
Found on
http://news.bbc.co.uk/2/hi/uk_news/2614839.stm
No exact match found.
