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From: "François Pinard" <pinard@iro.umontreal.ca>
To: emacs-orgmode@gnu.org
Subject: Re: Org-mode as a replacement for Google Reader
Date: Tue, 16 Apr 2013 08:05:56 -0400	[thread overview]
Message-ID: <86wqs21xzv.fsf@iro.umontreal.ca> (raw)
In-Reply-To: <87obdedapg.fsf@krugs.de> (Rainer M. Krug's message of "Tue, 16 Apr 2013 12:35:55 +0200")

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" :-).

François

  parent reply	other threads:[~2013-04-16 12:06 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-26 12:49 Karl Voit
2013-03-26 13:01 ` Andreas Leha
2013-03-26 14:35 ` Carmine Casciato
2013-03-26 14:58   ` Karl Voit
2013-03-26 15:42     ` Fabrice Popineau
2013-03-26 16:00       ` W. Greenhouse
2013-03-27  9:54         ` Karl Voit
2013-03-27 10:56           ` Samuel Loury
2013-03-27 11:59             ` Rasmus
2013-03-27 14:46             ` Karl Voit
2013-03-27 23:09             ` Jude DaShiell
2013-03-28  3:52               ` Carmine Casciato
2013-03-28 10:03                 ` Jude DaShiell
2013-03-28 17:18               ` François Pinard
2013-03-26 16:32       ` Nick Dokos
2013-03-26 19:41         ` Sebastien Vauban
2013-03-26 20:40           ` Fabrice Popineau
2013-04-14 14:14     ` Steinar Bang
2013-04-15  7:47       ` Rainer M. Krug
2013-04-16  9:35         ` Karl Voit
2013-04-16 10:35           ` Rainer M. Krug
2013-04-16 10:58             ` Karl Voit
2013-04-16 11:43               ` Tom
2013-04-16 13:21                 ` OT: Android, external HW-keyboard and Emacs (was: Org-mode as a replacement for Google Reader) Karl Voit
2013-04-16 18:30                   ` OT: Android, external HW-keyboard and Emacs David Rogers
2013-04-16 22:47                   ` Eric S Fraga
2013-04-23  9:05                     ` Karl Voit
2013-04-23  9:56                       ` Eric S Fraga
2013-04-23 10:33                         ` Android MobileOrg and appointments; ICS export and Google Calendar (was: OT: Android, external HW-keyboard and Emacs) Karl Voit
2013-04-23 13:25                           ` Android MobileOrg and appointments; ICS export and Google Calendar Eric S Fraga
2013-04-24  4:29                           ` Rémi Vanicat
2013-04-23 20:16                         ` OT: Android, external HW-keyboard and Emacs Julien Cubizolles
2013-04-24  7:36                           ` Eric S Fraga
2013-04-23 19:23                       ` 白い熊
2013-04-18 16:52                   ` OT: Android, external HW-keyboard and Emacs (was: Org-mode as a replacement for Google Reader) Subhan Tindall
2013-04-16 12:05             ` François Pinard [this message]
2013-04-16 22:49               ` Org-mode as a replacement for Google Reader Eric S Fraga
2013-03-26 18:31 ` Ivan Kanis
2013-03-27 13:18 ` [OT] Replacement for Google Reader (was: Org-mode as a replacement for Google Reader) Memnon Anon

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