A friend sent me this link to a nice web page by a German collector with an H316, which is worth perusing. http://h316.hachti.de/ From this page, select "Stuff", then the "Leonard Kleinrock materials" link for some interesting photos of an IMP -- and they are recent. That page has this link: http://www.lk.cs.ucla.edu/ Select from the title bar: "Internet history"