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Re: Barcodes (Was: Keyboards again)

From Bob Eager <news0073@eager.cx>
Newsgroups alt.folklore.computers
Subject Re: Barcodes (Was: Keyboards again)
Date 2020-10-03 22:00 +0000
Message-ID <htsak1FtmmrU3@mid.individual.net> (permalink)
References (7 earlier) <rjf5a5$lv4$1@dont-email.me> <rjhpbe$d29$2@newsreader4.netcologne.de> <slrnrlpflj.8gf.maus@dmaus.org> <jfi.5F78E5C5.42.fortytwo@xs4all.nl> <20201003221147.f7380a7ae515d04c9d05b016@eircom.net>

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On Sat, 03 Oct 2020 22:11:47 +0100, Ahem A Rivet's Shot wrote:

> On Sat, 03 Oct 2020 21:57:41 MET Jan van den Broek <fortytwo@xs4all.nl>
> wrote:
> 
>> 12 Sep 2020 12:27:31 GMT maus <maus@dmaus.org> schrieb:
>> 
>> [Schnipp]
>> 
>> >Bar code readers are fascinating devices. I had one, but it has
>> >disappeared somewhere while I was in hospital, bar codes contain data
>> >like recommended prices (different from what is on the supermarket
>> >packet), and so on.
>> 
>> Most of the time, barcodes just contain just an identifier, not all the
>> data.
> 
> 	There's not room for much data in a barcode, even the square QR
> codes only hold 64 bytes IIRC.

For QR codes, actually up to 7000 digits or 4000 characters. Look at the 
NHS QP code app, and how big those are. They are signed, too.

(source: pkg install libqrencode; man qrencode)




-- 
Using UNIX since v6 (1975)...

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Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-07 19:51 -0400
  Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-07 21:03 -0400
    Re: Keyboards again Quadibloc <jsavard@ecn.ab.ca> - 2020-09-07 18:16 -0700
      Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-07 21:50 -0400
    Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-07 22:12 -0400
      Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-07 23:51 -0400
        Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-12 17:40 -0400
          Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-12 18:04 -0400
      Re: Keyboards again drb@ihatespam.msu.edu (Dennis Boone) - 2020-09-08 13:19 -0500
        Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-08 14:48 -0400
          Re: Keyboards again Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-09-08 21:26 +0000
            Re: Keyboards again Peter Flass <peter_flass@yahoo.com> - 2020-09-08 14:48 -0700
            Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-08 17:52 -0400
              Re: Keyboards again Ahem A Rivet's Shot <steveo@eircom.net> - 2020-09-09 00:51 +0100
              Re: Keyboards again scott@slp53.sl.home (Scott Lurndal) - 2020-09-09 17:42 +0000
                Re: Keyboards again Ahem A Rivet's Shot <steveo@eircom.net> - 2020-09-09 19:50 +0100
                Re: Keyboards again scott@slp53.sl.home (Scott Lurndal) - 2020-09-09 19:49 +0000
                Re: Keyboards again Ahem A Rivet's Shot <steveo@eircom.net> - 2020-09-09 21:18 +0100
                Re: Keyboards again scott@slp53.sl.home (Scott Lurndal) - 2020-09-10 15:44 +0000
            Re: Keyboards again Freddy1X <freddy1X@indyX.netX> - 2020-09-08 21:59 -0400
              Re: Keyboards again gareth evans <headstone255@yahoo.com> - 2020-09-09 11:10 +0100
              Re: Keyboards again Quadibloc <jsavard@ecn.ab.ca> - 2020-09-09 15:27 -0700
                Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-10 17:47 -0400
                Re: Keyboards again Dave Garland <dave.garland@wizinfo.com> - 2020-09-11 01:26 -0500
                Re: Keyboards again Thomas Koenig <tkoenig@netcologne.de> - 2020-09-12 06:20 +0000
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-12 12:27 +0000
                Re: Keyboards again Bob Eager <news0073@eager.cx> - 2020-09-12 13:07 +0000
                Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-12 20:15 -0400
                Barcodes (Was: Keyboards again) Jan van den Broek <fortytwo@xs4all.nl> - 2020-10-03 21:57 +0100
                Re: Barcodes (Was: Keyboards again) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-10-03 22:11 +0100
                Re: Barcodes (Was: Keyboards again) Bob Eager <news0073@eager.cx> - 2020-10-03 22:00 +0000
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-03 19:26 -0400
                Re: Barcodes (Was: Keyboards again) Bob Eager <news0073@eager.cx> - 2020-10-04 09:02 +0000
                Re: Barcodes (Was: Keyboards again) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-10-04 12:22 +0100
                Re: Barcodes (Was: Keyboards again) Bob Eager <news0073@eager.cx> - 2020-10-04 16:42 +0000
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-04 22:39 +0100
                Re: Barcodes (Was: Keyboards again) Bob Eager <news0073@eager.cx> - 2020-10-04 22:06 +0000
                Re: Barcodes (Was: Keyboards again) Andy Burns <usenet@andyburns.uk> - 2020-10-04 08:30 +0100
                Re: Barcodes (Was: Keyboards again) the "Swampster" <fortytwo@xs4all.nl> - 2020-10-06 12:13 +0000
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-04 14:30 +0100
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-04 10:06 -0400
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-04 11:17 -0400
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-04 22:30 +0100
                Re: Barcodes (Was: Keyboards again) John Levine <johnl@taugh.com> - 2020-10-04 19:13 +0000
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-04 19:07 -0400
                Re: Barcodes (Was: Keyboards again) John Levine <johnl@taugh.com> - 2020-10-05 01:23 +0000
                Re: Barcodes (Was: Keyboards again) Andy Burns <usenet@andyburns.uk> - 2020-10-05 09:54 +0100
                Re: Barcodes (Was: Keyboards again) Peter Flass <peter_flass@yahoo.com> - 2020-10-05 05:34 -0700
                Re: Barcodes (Was: Keyboards again) Andy Burns <usenet@andyburns.uk> - 2020-10-05 13:47 +0100
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-05 11:22 -0400
                Re: Barcodes (Was: Keyboards again) Quadibloc <jsavard@ecn.ab.ca> - 2020-10-05 11:03 -0700
                Re: Barcodes (Was: Keyboards again) Peter Flass <peter_flass@yahoo.com> - 2020-10-05 11:10 -0700
                Re: Barcodes (Was: Keyboards again) Niklas Karlsson <anksil@yahoo.se> - 2020-10-05 18:27 +0000
                Re: Barcodes (Was: Keyboards again) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-10-05 20:03 +0100
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-05 18:20 -0400
                Re: Barcodes Dan Espen <dan1espen@gmail.com> - 2020-10-05 19:05 -0400
                Re: Barcodes J. Clarke <jclarke.873638@gmail.com> - 2020-10-05 23:57 -0400
                Re: Barcodes scott@slp53.sl.home (Scott Lurndal) - 2020-10-06 15:30 +0000
                Re: Barcodes (Was: Keyboards again) Peter Flass <peter_flass@yahoo.com> - 2020-10-05 16:52 -0700
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-05 23:54 -0400
                Re: Barcodes (Was: Keyboards again) Quadibloc <jsavard@ecn.ab.ca> - 2020-10-05 21:53 -0700
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-06 07:33 -0400
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-05 11:21 -0400
                Re: Barcodes (Was: Keyboards again) Dave Garland <dave.garland@wizinfo.com> - 2020-10-04 22:38 -0500
                Re: Barcodes (Was: Keyboards again) Quadibloc <jsavard@ecn.ab.ca> - 2020-10-04 21:19 -0700
                Re: Barcodes (Was: Keyboards again) Andy Leighton <andyl@azaal.plus.com> - 2020-10-05 03:04 -0500
                Re: Barcodes (Was: Keyboards again) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-10-05 11:01 +0100
                Re: Barcodes (Was: Keyboards again) gareth evans <headstone255@yahoo.com> - 2020-10-05 12:50 +0100
                Re: Barcodes (Was: Keyboards again) Peter Flass <peter_flass@yahoo.com> - 2020-10-05 05:34 -0700
                Re: Barcodes (Was: Keyboards again) Dave Garland <dave.garland@wizinfo.com> - 2020-10-05 10:06 -0500
                Re: Barcodes (Was: Keyboards again) maus <maus@dmaus.org> - 2020-10-06 21:16 +0000
                Re: Barcodes (Was: Keyboards again) Ahem A Rivet's Shot <steveo@eircom.net> - 2020-10-07 06:38 +0100
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-05 12:36 +0100
                Re: Barcodes (Was: Keyboards again) Andy Burns <usenet@andyburns.uk> - 2020-10-05 08:00 +0100
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-04 22:28 +0100
                Re: Barcodes (Was: Keyboards again) J. Clarke <jclarke.873638@gmail.com> - 2020-10-04 19:06 -0400
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-05 12:33 +0100
                Re: Barcodes (Was: Keyboards again) Andy Burns <usenet@andyburns.uk> - 2020-10-05 08:24 +0100
                Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-12 20:02 -0400
                Re: Keyboards again Thomas Koenig <tkoenig@netcologne.de> - 2020-09-13 07:05 +0000
                Re: Keyboards again Ahem A Rivet's Shot <steveo@eircom.net> - 2020-09-13 09:24 +0100
                Re: Keyboards again Bob Eager <news0073@eager.cx> - 2020-09-13 09:38 +0000
                Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-13 19:20 -0400
                Re: Keyboards again Bob Eager <news0073@eager.cx> - 2020-09-13 23:54 +0000
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-15 18:47 +0000
                Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-15 18:35 -0400
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-15 18:44 +0000
                Re: Keyboards again gareth evans <headstone255@yahoo.com> - 2020-09-15 20:29 +0100
                Re: Keyboards again Bob Eager <news0073@eager.cx> - 2020-09-15 21:21 +0000
                Re: Keyboards again Peter Flass <peter_flass@yahoo.com> - 2020-09-15 18:49 -0700
                Re: Keyboards again Ahem A Rivet's Shot <steveo@eircom.net> - 2020-09-16 07:56 +0100
                Re: Keyboards again gareth evans <headstone255@yahoo.com> - 2020-09-16 10:16 +0100
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-16 09:55 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-16 11:25 -0500
                Re: Keyboards again Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-09-16 17:42 +0000
                Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-16 18:03 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-16 13:57 -0500
                Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-16 19:08 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-16 16:48 -0500
                Re: Keyboards again Ahem A Rivet's Shot <steveo@eircom.net> - 2020-09-17 06:55 +0100
                Re: Keyboards again usenet@only.tnx (Questor) - 2020-09-16 21:03 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-16 16:53 -0500
                Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-16 21:55 +0000
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-17 07:20 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-17 10:06 -0500
                Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-17 11:15 -0400
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-17 12:37 -0500
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-17 20:07 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-18 10:01 -0500
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-18 16:45 +0000
                Re: Keyboards again Peter Flass <peter_flass@yahoo.com> - 2020-09-18 11:22 -0700
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-17 19:59 +0000
                Re: Keyboards again usenet@only.tnx (Questor) - 2020-09-19 23:25 +0000
                Re: Keyboards again Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-09-20 12:03 +0100
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-20 14:27 +0000
                Re: Keyboards again Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-09-20 16:08 +0100
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-20 10:52 -0500
                Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-20 14:57 -0400
                Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-21 09:09 +0000
                Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-21 09:07 +0000
                Re: Keyboards again Chris <xxx.syseng.yyy@gfsys.co.uk> - 2020-09-21 14:32 +0100
                Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-21 13:37 +0000
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-22 12:45 +0000
                Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-22 12:49 +0000
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-22 12:37 +0000
                Re: Keyboards again Bob Eager <news0073@eager.cx> - 2020-09-22 13:38 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-22 09:31 -0500
                Re: Keyboards again Peter Flass <peter_flass@yahoo.com> - 2020-09-22 15:39 -0700
                Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-22 20:55 -0400
                Re: Keyboards again Quadibloc <jsavard@ecn.ab.ca> - 2020-09-22 19:39 -0700
                Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-23 00:13 -0400
                Re: Keyboards again maus <maus@dmaus.org> - 2020-09-23 10:52 +0000
                Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-20 14:48 -0400
                Re: Keyboards again usenet@only.tnx (Questor) - 2020-09-21 19:35 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-22 09:22 -0500
                Re: Keyboards again scott@slp53.sl.home (Scott Lurndal) - 2020-09-13 15:34 +0000
                Re: Keyboards again Mike Spencer <mds@bogus.nodomain.nowhere> - 2020-09-13 17:54 -0300
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-13 10:53 -0500
                Re: the dangers of socialism, not Keyboards again John Levine <johnl@taugh.com> - 2020-09-13 17:50 +0000
                Re: the dangers of socialism, not Keyboards again Andy Burns <usenet@andyburns.uk> - 2020-09-13 19:35 +0100
                Re: the dangers of socialism, not Keyboards again John Levine <johnl@taugh.com> - 2020-09-13 19:33 +0000
                Re: the dangers of socialism, not Keyboards again Bob Martin <bob.martin@excite.com> - 2020-09-14 06:02 +0000
                Re: the dangers of socialism, not Keyboards again Andy Burns <usenet@andyburns.uk> - 2020-09-14 07:46 +0100
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-13 15:01 -0500
                Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-13 19:25 -0400
                Re: Keyboards again Bob Eager <news0073@eager.cx> - 2020-09-13 09:37 +0000
                Barcodes (Was: Keyboards again) Jan van den Broek <fortytwo@xs4all.nl> - 2020-10-03 22:00 +0100
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-04 14:38 +0100
                Re: Barcodes (Was: Keyboards again) mjb@signal11.invalid (Mike) - 2020-10-04 22:36 +0100
              Re: Keyboards again Andy Burns <usenet@andyburns.uk> - 2020-09-10 10:39 +0100
            Re: Keyboards again Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-09-09 06:02 +0000
            Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-09 14:14 +0000
              Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-09 10:18 -0400
            Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-09 14:49 -0500
            Re: Keyboards again mjb@signal11.invalid (Mike) - 2020-09-09 20:36 +0100
            Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-09 18:51 -0400
              Re: Keyboards again Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2020-09-10 16:24 +0000
                Re: Keyboards again JimP <chucktheouch@gmail.com> - 2020-09-10 14:58 -0500
              Re: Keyboards again Ahem A Rivet's Shot <steveo@eircom.net> - 2020-09-10 17:12 +0100
                Re: Keyboards again Andreas Kohlbach <ank@spamfence.net> - 2020-09-10 17:49 -0400
  Re: Keyboards again Quadibloc <jsavard@ecn.ab.ca> - 2020-09-07 18:09 -0700
    Re: Keyboards again Quadibloc <jsavard@ecn.ab.ca> - 2020-09-07 18:14 -0700
    Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-07 22:19 -0400
      Re: Keyboards again Quadibloc <jsavard@ecn.ab.ca> - 2020-09-07 20:14 -0700
        Re: Keyboards again Quadibloc <jsavard@ecn.ab.ca> - 2020-09-07 20:32 -0700
      Re: Keyboards again Niklas Karlsson <anksil@yahoo.se> - 2020-09-08 09:44 +0000
    Re: Keyboards again Andy Burns <usenet@andyburns.uk> - 2020-09-08 10:49 +0100
      Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-08 07:17 -0400
      Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-08 08:02 -0400
        Re: Keyboards again J. Clarke <jclarke.873638@gmail.com> - 2020-09-08 18:33 -0400
          Re: Keyboards again Dan Espen <dan1espen@gmail.com> - 2020-09-08 19:59 -0400

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