Karate was a form of martial art.
Space Security Service agents were trained in dakaro, a kind of karate which used pressure to cause spine dislocation. (COMIC: Sara Kingdom: Space Security Agent)
Jo Grant claimed that she was "pretty nifty at karate" and that she once rendered Sgt. Benton unconscious. (AUDIO: Ghost in the Machine)
Stuart Dale did karate at school. (AUDIO: The Blood Furnace)