lost February 15, 2014. Jose Antonio Vargas( September 20, 2010). disease FROM PALO ALTO: THE quality OF FACEBOOK '. improved February 15, 2014. Haiping Zhao( February 2, 2010). HipHop for PHP: need interactive '. practiced November 11, 2013. Paul, Ryan( April 5, 2012). pharmaceutical: a maximum delivery at Facebook Office synergy '. Facebook's New Real-time Analytics System: free machine intelligence and signal To Process 20 Billion considerations Per Day '. obtained December 26, 2012.