Outreach: The Internet互联网档案馆的存檔,存档日期2014-01-18., U.S. National Science Foundation, "In March 1991, the NSFNET acceptable use policy was altered to allow commercial traffic."
Outreach: The Internet互联网档案馆的存檔,存档日期2014-01-18., U.S. National Science Foundation, "In March 1991, the NSFNET acceptable use policy was altered to allow commercial traffic."