Computer security and software companies are urging the U.S. Senate to approve <A HREF="http://news.zdnet.com/2100-1009_22-5768462.html?tag=zdnn.alert">the world's first treaty targeting cybercrime.</A> A letter from the groups, including the Business Software Alliance, VeriSign, InfraGard and the Cyber Security Industry Alliance, called on senators to ratify the controversial document, which was the subject of a brief flurry of attention last year before it expired without a floor vote.