WASHINGTON, May 25 (UPI) -- A bipartisan congressional report says Chinese government organizations involved in military research have acquired high performance computers from the United States since the relaxation of U.S. export controls in 1996. The number of high performance computers, or HPCs, exported to China may top 600, the report says. The Cox report, released today by a bipartisan House select committee, says even though China ``lags far behind world levels'' in software, the high performance computers from the United States are being used for a wide range of military upgrades. Those applications allegedly include: -- Upgrading and maintaining nuclear and chemical weapons. -- Equipping mobile forces with high-technology weapons. -- Building a modern fleet of combat and combat-support aircraft and submarines.`` -- Conducting anti-submarine warfare. -- Developing a reliable, accurate ballistic and cruise missile force. -- Equalizing a battlefield with electronic or information warfare. -- Improving command, control, communications and intelligence capabilities. The report also says U.S. national weapons laboratories are ``modernizing their test data or 'legacy codes' based on data from the large number of U.S. tests.'' Pointing to the need for absolute security during this process, the report says, ``The select committee judges that if the (People's Republic of China) were to acquire nuclear test codes and data from the United States, then the PRC could access...data'' from the tests conducted before the Comprehensive Test Ban Treaty. The report asserts that HPCs at the U.S. nuclear weapons laboratories, such as Los Alamos, and the data they contain ``have been the focus of (Chinese) and other countries intelligence efforts.'' It lists recommendations from David Nokes, network administrator at Los Alamos, to make the computer networks more secure. They include: -- Allowing only U.S. students, not foreign students, to use the networks. -- Limiting physical access to high performance computer networks at universities. -- Enhancing physical security and security education at universities.  