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While most keys produce [[character (computing)|characters]] ([[Letter (alphabet)|letters]], [[Numerical digit|numbers]] or symbols), other keys (such as the [[escape key]]) can prompt the computer to execute system commands. In a modern computer, the interpretation of key presses is generally left to the software: the information sent to the computer, the [[scan code]], tells it only which physical key (or keys) was pressed or released.<ref name="msusb13a">[http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc Microsoft Keyboard Scan Code Specification] {{Webarchive|url=https://web.archive.org/web/20200909230403/https://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc |date=9 September 2020 }} ([http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc Appendix C, "USB Keyboard/Keypad Page (0x07)"] {{Webarchive|url=https://web.archive.org/web/20200909230403/https://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc |date=9 September 2020 }}), [[Microsoft]]. Revision 1.3a, 2000-03-16, accessed 2018-10-13.</ref>
In normal usage, the keyboard is used as a [[text entry interface]] for typing text, numbers, and symbols into [[application software]] such as a [[word processor]], [[web browser]] or [[social media]] app. Touchscreens use [[virtual keyboard]]s.
==History==
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