484:
967:
476:
38:
120:
282:
1056:
727:
537:
proposal to align the
Unicode reference glyphs with the ITU specifications for these symbols, and annotate them as telephone keypad symbols on the code charts. As of 2019 (Unicode 12.1), these changes have not been accepted/implemented.
177:
which was the operator of the national telephone system. The first prototype became operational in 1974. The access, request and reception are usually via common carrier broadcast channels. This is in contrast with
264:-based standard. Viewdata is regarded within the industry as low-cost and reliable, travel consultants have been trained to use Viewdata and would need training to book holidays on the Internet, and
731:
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342:
It was made in the late 1970s and early 1980s to make it easier for travel consultants to check availability and make bookings for holidays. A number of
Viewdata
1085:
552:
600:"E.161 : Arrangement of digits, letters and symbols on telephones and other devices that can be used for gaining access to a telephone network"
511:(#), which do not necessarily conform to the ITU specifications for the keypad symbols; the asterisk is also usually displayed smaller and raised.
173:, who had the idea for Viewdata in 1968, was credited as inventor of the system which was developed while working for the British
676:
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1080:
709:
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329:
311:
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791:(running on the original software and hardware from the time of its original incarnation, accessed via java client)
742:
17:
1033:
307:
60:, England. Note the "_ to continue" rather than the correct "# to continue", showing a common rendering error.
43:
194:(IRV IA5) – 7 bits with no accented characters. Originally Viewdata was accessed with a special purpose
773:
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303:
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527:
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1005:
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632:"Proposal to incorporate two telephony symbols into Unicode by glyph and annotation changes"
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Viewdata uses special symbols already widely available on telephone keypads: the
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existed in the 1980s, predominantly in the UK due to the proliferation of the
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speed (1,200 bit/s down, 75 bit/s up). By 2004 it was normally accessed over
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119:
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53:
257:. Once they find what the customer is looking for they can place a booking.
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vogue. Some
Viewdata boards still exist, with accessibility in the form of
246:
508:
460:
814:
479:
Detail of a telephone keypad displaying the sextile and
Viewdata square
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210:
143:
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An ncurses/terminal client for TeeFax, Telstar, CCl4, NXTel and others
667:
503:. These are often treated as approximately corresponding to the ASCII
37:
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83:
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57:
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These symbols appear as 'Sextile' and 'Viewdata square' in the
362:
214:
802:
777:
42:
Viewdata
Graphics used in the experimental phone directory of
987:
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Detail of a telephone keypad substituting an enlarged * and #
368:
207:
203:
166:
783:
820:
522:
Unicode blocks, respectively. The sextile was added due to
260:
There are a number of factors still holding up a move to a
162:
48:
The image is a graphical representation of the Post Office/
762:
Definition at The
Institute for Telecommunication Sciences
190:
Viewdata offered a display of 40×24 characters, based on
811:
A Viewtex web client for TeeFax, Telstar, CCl4 and NXTel
780:
and client implementation, and a public hosted service).
769:
530:
character set, as a replacement for the underscore.
1091:
History of telecommunications in the United
Kingdom
669:Alphanumerics for viewdata and broadcast teletext
1072:
526:, and the square had previously appeared in the
249:use it to look up the price and availability of
27:Information retrieval service and legacy system
693:
533:In 2013, the German national body submitted a
499:"square" key, as formally standardised by the
836:
629:
237:As of 2015, Viewdata was still in use in the
310:. Unsourced material may be challenged and
1086:History of computing in the United Kingdom
843:
829:
625:
623:
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369:Keypad symbols: the sextile and the square
354:appeared in the late 1990s fuelled by the
662:
656:
330:Learn how and when to remove this message
271:
482:
474:
118:
618:
576:"Proceedings of the Videotex in Europe"
268:cannot agree on a Web-based standard.
14:
1073:
766:Examples of existing Viewdata boards:
824:
604:International Telecommunication Union
570:
568:
501:International Telecommunication Union
1055:
308:adding citations to reliable sources
275:
805:Including several Prestel Brochures
803:Celebrating the Viewdata Revolution
24:
797:(running emulated through the web)
565:
232:
25:
1112:
755:
630:Karl Pentzlin (28 October 2013).
229:, or using a Web-based emulator.
169:display over a separate channel.
138:implementation. It is a type of
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965:
730: This article incorporates
725:
715:from the original on 2022-10-09.
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165:and receive requested data on a
123:A Viewdata machine displayed in
36:
743:General Services Administration
644:from the original on 2022-10-09
687:
592:
44:Post Office Telecommunications
13:
1:
558:
185:
850:
7:
1081:Computer network technology
1012:Singapore Teleview Terminal
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535:Unicode Technical Committee
95:; 50 years ago
10:
1117:
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1021:
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963:
858:
699:"Miscellaneous Technical"
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375:
107:
89:
79:
65:
35:
784:Telstar Videotex Service
520:Miscellaneous Technical
447:*, *
382:Viewdata keypad symbols
52:Research laboratories (
1039:Videotex character set
738:Federal Standard 1037C
732:public domain material
488:
480:
344:bulletin board systems
272:Bulletin board systems
128:
516:Miscellaneous Symbols
486:
478:
140:information retrieval
122:
706:The Unicode Standard
524:its use in astrology
350:, and a short-lived
304:improve this section
495:"star" key and the
142:service in which a
32:
956:Singapore Teleview
695:Unicode Consortium
637:. UTC L2/13-105R.
489:
481:
200:emulation software
129:
30:
1068:
1067:
920:Genesis Storytime
795:The Dwarfen Realm
606:. 2 February 2001
473:
472:
340:
339:
332:
227:Microsoft Windows
223:personal computer
117:
116:
16:(Redirected from
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1061:Commons category
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1000:AT&T Sceptre
969:
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745:. Archived from
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553:Telstar Viewdata
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352:Viewdata Revival
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251:package holidays
241:, mainly by the
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417:VIEWDATA SQUARE
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243:travel industry
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233:Travel industry
219:client software
217:using Viewdata
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50:British Telecom
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28:
23:
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18:Viewdata square
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756:External links
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749:on 2022-01-22.
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666:(1981-06-01).
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356:retrocomputing
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289:This section
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247:Travel agents
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70:Samuel Fedida
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55:
54:Adastral Park
51:
45:
39:
34:
19:
1060:
932:Microtex 666
865:
778:page manager
747:the original
737:
705:
689:
668:
658:
646:. Retrieved
608:. Retrieved
594:
583:. Retrieved
581:. 1979-07-19
532:
513:
490:
351:
341:
326:
317:
302:Please help
290:
259:
236:
189:
131:
130:
648:23 December
610:23 December
528:BS_Viewdata
509:number sign
462:NUMBER SIGN
206:running at
175:Post Office
109:Platform(s)
90:Launch date
74:Post Office
1075:Categories
585:2023-12-26
559:References
186:Technology
161:, request
144:subscriber
1022:Standards
982:BBC Micro
975:Terminals
789:Ringworld
467:#
365:clients.
348:BBC Micro
320:June 2023
291:does not
150:a remote
66:Developer
46:in 1977.
1101:Videotex
896:Viewtron
866:Viewdata
859:Services
852:Videotex
776:server,
710:Archived
675:. ITSCJ/
639:Archived
542:See also
507:(*) and
505:asterisk
442:ASTERISK
414:⌗
401:⚹
388:In
225:running
202:) and a
196:terminal
180:teletext
152:database
136:Videotex
132:Viewdata
125:teletext
113:Viewdata
84:Videotex
31:Viewdata
1044:Antiope
1006:Alextel
914:Captain
890:Minitel
884:Viditel
878:Prestel
872:Telidon
809:vd-view
548:Prestel
404:SEXTILE
390:Unicode
312:removed
297:sources
255:flights
192:ISO 646
159:channel
98: (
58:Suffolk
1029:NAPLPS
1014:(1991)
1008:(1988)
1002:(1983)
996:(1982)
990:(1981)
984:(1981)
958:(1991)
952:(1988)
946:(1988)
940:(1986)
938:Bistel
934:(1986)
928:(1985)
926:Beltel
922:(1983)
916:(1983)
910:(1983)
904:(1983)
898:(1983)
892:(1982)
886:(1980)
880:(1979)
874:(1978)
868:(1975)
815:vidtex
681:ISO-IR
458:#
455:
453:U+0023
438:*
435:
433:U+002A
411:
409:U+2317
398:
396:U+26B9
363:Telnet
215:TCP/IP
154:via a
148:access
127:format
988:MUPID
770:NXtel
734:from
713:(PDF)
702:(PDF)
673:(PDF)
642:(PDF)
635:(PDF)
579:(PDF)
221:on a
208:ITU-T
204:modem
167:video
134:is a
56:) in
1034:CEPT
994:NABU
944:Alex
774:free
683:-47.
677:IPSJ
650:2019
612:2019
518:and
360:Java
295:any
293:cite
253:and
211:V.23
198:(or
163:data
146:can
100:1974
93:1974
80:Type
772:(a
664:BSI
376:⌗ ⚹
306:by
262:Web
1077::
741:.
708:.
704:.
697:.
679:.
620:^
602:.
567:^
245:.
182:.
72:,
844:e
837:t
830:v
652:.
614:.
588:.
497:⌗
493:⚹
469:)
465:(
449:)
445:(
333:)
327:(
322:)
318:(
314:.
300:.
102:)
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
