From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?utf-8?Q?Fran=C3=A7ois_Pinard?= Subject: Re: Org-mode as a replacement for Google Reader Date: Tue, 16 Apr 2013 08:05:56 -0400 Message-ID: <86wqs21xzv.fsf@iro.umontreal.ca> References: <2013-03-26T13-37-35@devnull.Karl-Voit.at> <2013-03-26T15-53-35@devnull.Karl-Voit.at> <878v4li4i4.fsf@dod.no> <871uacutew.fsf@krugs.de> <2013-04-16T11-31-28@devnull.Karl-Voit.at> <87obdedapg.fsf@krugs.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([208.118.235.92]:58026) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1US4e9-0006FH-Um for emacs-orgmode@gnu.org; Tue, 16 Apr 2013 08:06:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1US4e5-0002Cp-MN for emacs-orgmode@gnu.org; Tue, 16 Apr 2013 08:06:01 -0400 Received: from 206-248-137-202.dsl.teksavvy.com ([206.248.137.202]:52393 helo=mercure.bureau.ubity.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1US4e5-0002C3-Gg for emacs-orgmode@gnu.org; Tue, 16 Apr 2013 08:05:57 -0400 In-Reply-To: <87obdedapg.fsf@krugs.de> (Rainer M. Krug's message of "Tue, 16 Apr 2013 12:35:55 +0200") List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org To: emacs-orgmode@gnu.org Rainer@krugs.de (Rainer M. Krug) writes: > Ack? That comes from ASCII (the first edition of the standard), which had two control characters (OK, it had more than two control characters, but I'm only looking at those two!): ACK and NAK, for Acknowledge and Negative Acknowledge. At this time, serial communications were often half duplex (only one side writes at a time), and prone to loosing characters. RS 232 defined RTS and CTS (Request to Send and Clear to Send) for implementing half duplex at the wire level. When at a higher level, things were differing depending on if you used asynchronous modems or rarer synchronous modems (where start bits and stop bits could be spared, so increasing the speed a tiny bit): asynchronous were using XON and XOFF (Transmission On and Transmission Off), synchronous were using ACK and NAK. Do I remember well? In ASCII 2, XON/XOFF/ACK/NAK were all renamed DC1/DC2/DC3/DC4 (not necessarily in that order), (DC stands for Data Control). Or was it SI and SO (Shift In and Shift Out)? I'm not sure. Yet, in any case, ACK and NAK remained in the culture for much longer. This is while going from ASCII 1 to ASCII 2 that NUL and BEL both acquired their second "L" :-). Fran=C3=A7ois