K-9 refers to a variety of entries, most related to dogs. The term originated in the military, where designations such as G-2 are common, making K-9 a rare official pun, being similar to 'canine'.
K-9 is the US military designation for war dogs, also used by departments of the police that use dogs in their work.
K-9 is the name of several robotic dogs which were characters in the BBC television drama Doctor Who.
K-9 Kadets is a movie released in 1944: [1] (http://www.imdb.com/title/tt0239516/)
K-9 and Company is a failed pilot for a proposed TV series released in 1981: [2] (http://www.imdb.com/title/tt0138972/)
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