1 | http://www.apple.com/iphone/features/siri.html |
2 | http://www.ytn.co.kr/_ln/0102_201201120215286812 |
3 | 시로타마코타 저, 진명조 역, "클라우드의 충격", 제이펍. 2010 |
4 | http://www.computerworld.com/s/article/9218177/Google_vs._Facebook_by_the_numbers |
5 | http://www.slideshare.net/clickstone/social-recommendation |
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