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I've gone by SifuKurt online for many years. I used to go by Beowulf (when I wrote my Master's thesis, I spent more time with that particular Old English poem than I spent with my family). At any rate, in addition to being a programmer, I'm a martial artist and have been since I was six years old. (Just had a birthday, doing math in head....26 years.) "Sifu," pronounced "See Foo," is the title in Chinese martial systems, collectively known as Kung Fu, that is given to the teacher. Sifu literally means "teacher father." I teach three Chinese systems, Taiji Quan (aka Tai Chi Chuan), Chung-I Quan, and Wu Dan Snake System. I was awarded the title "Sifu" by my instructor shortly before he passed away. When I teach, I like to keep my classes somewhat informal, hence I prefer to go by first name, Sifu Kurt, rather than last name, Sifu Kincaid. Also Sifu Kurt is easier to say.