<p>BOSTON — Federal agents late Thursday night raided a Quincy, Mass., company that provides critical software to major U.S. agencies and is suspected of having ties to Usama bin Laden and Al Qaeda terrorists.</p>
<p>Ptech Inc.'s clients include the FBI, Internal Revenue Service, Energy Department, Federal Aviation Administration, U.S. Naval air systems, the U.S. Air Force, NATO, the U.S. House of Representatives, the Department of Energy and the agency that handles nuclear weapons security, according to its Web site.</p>