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Howard Joel Wolowitz, M.Eng., is a Jewish aerospace engineer and astronaut. He is the son of an overbearing mother who couldn't care less about his scientific accomplishments and still talks to him as if he were a child. As the best friend of Rajesh Koothrappali, Howard often hangs out at Leonard and Sheldon's apartment with him. Although he's the only member of the group lacking a doctoral degree, he defends himself by pointing out that he not only has a Master's degree in Engineering from MIT, but also designs important devices like the "space toilet" used at the International Space Station. Fancying himself a smooth ladies' man, Howard is rather confident in trying to woo girls (unlike the other three), mostly through creepy overtures and sometimes with his knowledge of foreign languages, of which he knows seven (if you count Klingon). During the show he dates and eventually marries Bernadette, with whom he bonded over their hatred towards their overbearing mothers and has been influenced to tone down his creepy behavior.