Computer keyboard: Difference between revisions

Revision as of 04:09, 1 January 2025

Latest revision as of 18:30, 9 August 2025

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{{Short description|Data input device}}

{{Distinguish|keyboard computer}}

{{Other uses|Keyboard (disambiguation){{!}}Keyboard}}

{{Use dmy dates|date=December 2016}}

[[File:Typing example.ogv|thumb|[[Typing]] on a laptop keyboard]]

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An optical keyboard technology<ref>{{cite web |title=What is an Optical Keyboard? |url=https://www.wisegeek.com/what-is-an-optical-keyboard.htm |access-date=6 August 2018 |archive-date=7 August 2018 |archive-url=https://web.archive.org/web/20180807001541/https://www.wisegeek.com/what-is-an-optical-keyboard.htm |url-status=live }}</ref>{{better source needed|reason=user-generated content, not a [[wp:reliable source]]|date=March 2023}} utilizes [[Light-emitting diode|LEDs]] and [[Photoelectric sensor|photo sensors]] to optically detect actuated keys. Most commonly the emitters and sensors are located in the perimeter, mounted on a small [[Printed circuit board|PCB]]. The [[light]] is directed from side to side of the keyboard interior and it can only be blocked by the actuated keys. Most optical keyboards<ref>{{cite web

|title=Best Optical Keyboards

|work=GamingFactors

|url=https://www.gamingfactors.com/best-optical-keyboard

|date=16 February 2018

|url=https://www.gamingfactors.com/best-optical-keyboard

|access-date=6 August 2018

|archive-date=7 August 2018

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{{Main|Esc key}}

<!-- some keyboards said "ESCAPE" - NYTimes agrees -->

The [[Esc key|escape key]] ({{keypress|esc}}) has a variety of meanings according to Operating System, application or both. "Nearly all of the time",<ref name=SF>{{cite web |title=The Qodem Homepage |website=SourceForge |url=httphttps://qodem.sourceforge.net/ |date=18 June 2017 |quote=Nearly all of the time pressing the ESCAPE key ... will work to get out of dialogs |access-date=30 October 2018 |archive-date=22 December 2010 |archive-url=https://web.archive.org/web/20101222041727/http://qodem.sourceforge.net/ |url-status=live }}</ref> it signals ''Stop'',<ref>{{cite web |website=[[The New York Times]] |url=https://www.nytimes.com/2012/10/07/magazine/who-made-that-escape-key.html |title=Who Made That Escape Key? |author=Pagan Kennedy |date=5 October 2012 |access-date=30 October 2018 |archive-date=15 November 2018 |archive-url=https://web.archive.org/web/20181115155513/https://www.nytimes.com/2012/10/07/magazine/who-made-that-escape-key.html |url-status=live }}</ref> ''QUIT'',<ref>{{cite web |title=Kermit Manual |url=http://www.columbia.edu/kermit/ftp/bbcmicro/bbckerdoc.txt |quote=ESCAPE key to quit and input another command. |access-date=30 October 2018 |archive-date=16 November 2019 |archive-url=https://web.archive.org/web/20191116121311/http://www.columbia.edu/kermit/ftp/bbcmicro/bbckerdoc.txt |url-status=live }}</ref> or "let me get out of a dialog" (or pop-up window).<ref name=SF/><ref>{{cite web |title=Escape key |url=http://www.dictionary.com/browse/escape-key |website=dictionary.com |access-date=30 October 2018 |archive-date=9 August 2018 |archive-url=https://web.archive.org/web/20180809152717/https://www.dictionary.com/browse/escape-key |url-status=live }}</ref> It triggers the Stop function in many web browsers.<ref name=SF2>{{cite web |title=The Qodem Homepage |website=SourceForge |url=https://www.plaza.ir/search/category-Keyboard |date=18 June 2017 |quote=Nearly all of the time pressing the ESCAPE key ... will work to get out of dialogs |access-date=13 July 2020 |archive-date=28 July 2020 |archive-url=https://web.archive.org/web/20200728185746/https://www.plaza.ir/search/category-Keyboard |url-status=live }}</ref>

The escape key was part of the standard keyboard of the [[Teletype Model 33]] (introduced in 1964 and used with many early minicomputers).<ref>{{cite web |first=David |last=Gesswein |date=n.d. |url=https://www.pdp8.net/asr33/asr33.shtml |title=ASR 33 Information |access-date=31 October 2019 |archive-date=24 February 2020 |archive-url=https://web.archive.org/web/20200224071524/http://www.pdp8.net/asr33/asr33.shtml |url-status=live }}</ref> The [[Digital Equipment Corporation|DEC]] [[VT50]], introduced July 1974, also had an Esc key. The [[TECO (text editor)|TECO]] text editor (ca 1963) and its descendant [[GNU Emacs|Emacs]] (ca 1985) use the Esc key extensively.

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[[Category:Computing input devices]]

[[Category:Flexible electronics]]

[[Category:Video game control methods]]