An unprecedented string of electronic intrusions has prompted Ohio University to place at least one technician on paid administrative leave and begin a sweeping reorganization of the university's computer services department. Bill Sams, Ohio University's chief information officer, said he initiated the reorganization on Friday. The Athens, Ohio-based university is reacting to recent discoveries that data thieves <A HREF="http://news.zdnet.com/2100-1009_22-6074739.html?tag=zdnn.alert">compromised at least three campus computer servers.</A> In a disclosure that hasn't been widely reported, one of the compromised servers, which held Social Security numbers belonging to 137,000 people, was penetrated by U.S. and overseas-based hackers for at least a year and possibly much longer.