为了弄清美国的科技档案与科技档案工作状况，我们有必要再研究一下美国政府四大科技报告 (下称美国四大报告 )和中国国防科技报告 (下称中国 GF报告 )的档案性问题。 　　　　一、美国政府四大科技报告 　　　　美国政府四大科技报告是指： 　　1.国防部和三军系统的 AD报告； In order to understand the state of science, technology, science, technology and archival work in the United States, it is necessary for us to study the archival issues of the four major scientific and technological reports of the U.S. government (hereinafter referred to as the “U.S. big four reports”) and China’s national defense science and technology report (the “China GF report”). I. The Four Major Scientific and Technological Reports by the U.S. Government The four major scientific and technological reports by the U.S. government refer to: 1. the AD report of the Ministry of National Defense and the three armed forces system;