<p>The Twitter logo is displayed at the entrance of the company's headquarters in San Francisco.(Photo: KIMIHIRO HOSHINO AFP/Getty Images)</p><p>SAN FRANCISCO Twitter was notably missing from a leaked list of Internet giants reported to be cooperating with The National Security Agency and the FBI on the surveillance program dubbed PRISM.</p><p>Those agencies are siphoning data from the servers of nine U.S. Internet companies including Microsoft, Yahoo, Google, Facebook, PalTalk, AOL, Skype, YouTube and Apple, according to news reports about the documents. The cloud storage device Dropbox was described as "coming soon," along with other unidentified firms.</p><p>Google and Apple have both denied any knowledge of PRISM. Apple stated "any government agency requesting customer data must get a court order." Google said "we disclose user data to government in accordance with the law, and we review all such requests carefully.</p><p><a href="http://www.usatoday.com/story/tech/2013/06/07/nsa-prism-twitter/2401605/">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.cbsnews.com/8301-205_162-57588299/nsacalledtotellme-twitter-trend-makes-light-of-nsa-data-mining/">Twitter trend makes light of NSA data mining</a> (CBS News)</p><p><a href="http://qz.com/91889/twitter-boosts-its-privacy-cred-with-its-absence-from-the-nsas-surveillance-program/">Twitter boosts its privacy cred with its absence from the NSA&#039;s surveillance ...</a> (Quartz)</p><p><a href="http://news.yahoo.com/twitter-employees-just-shocked-prism-114009700.html">Twitter Employees Are Just as Shocked About PRISM as You Are</a> (Yahoo! News)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=dIMmrBlLu4u07TMdr035NOKUR3DTM&ned=us">922 additional articles.</a></p>