From mboxrd@z Thu Jan 1 00:00:00 1970 From: dave@horsfall.org (Dave Horsfall) Date: Mon, 1 Jan 2018 10:22:02 +1100 (EST) Subject: [TUHS] OT: Grace Hopper, Unix epoch, ARPAnet converted to TCP/IP In-Reply-To: <20171231231022.CDC7218C09C@mercury.lcs.mit.edu> References: <20171231231022.CDC7218C09C@mercury.lcs.mit.edu> Message-ID: On Sun, 31 Dec 2017, Noel Chiappa wrote: > > the ARPAnet got converted from NCP to TCP/IP in 1983; ... have a more > > precise date? > > No, it was Jan 1. aneurin% date Mon Jan 1 10:14:58 EST 2018 What timezone did you say you were in again? This is the problem when expressing historical events... > It wasn't so much a 'conversion', as that was the date on which, except > for a few sites which got special _temporary_ dispensation to finish > their preparations, support for NCP was turned off for most ARPANET > hosts. Prior to that date, most hosts on the ARPANET had been running > both, and after that, only TCP worked. (Non-ARPANET hosts on the > then-nascent Internet had always only been using TCP before that date, > of course.) Thanks; I'll amend my notes accordingly. -- Dave Horsfall DTM (VK2KFU) "Those who don't understand security will suffer."