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WikiPedia: Opera_(trình_duyệt_web) http://ds.advancedmn.com/article.php?artid=3341 http://www.alistapart.com/articles/msn/ http://www.amazon.com/dp/B000OAO494 http://arstechnica.com/software/reviews/2009/09/fi... http://operawatch.blogspot.com/2005/04/get-back-ol... http://edition.cnn.com/2011/TECH/mobile/02/14/oper... http://news.com.com/2100-1023-274944.html http://news.com.com/2100-1023-960408.html http://news.com.com/2100-1023-983500.html http://news.com.com/2100-1032_3-1008869.html