ASCII: Difference between revisions

Originally based on the (modern) [[English alphabet]], ASCII encodes 128 specified [[character (computing)|characters]] into seven-bit integers as shown by the ASCII chart in this article.<ref name="RFC-4949">{{cite IETF |title=Internet Security Glossary, Version 2 |date=August 2007 |author-first=R. |author-last=Shirley |rfc=4949 |access-date=2016-06-13}}</ref> Ninety-five of the encoded characters are printable: these include the digits ''0'' to ''9'', lowercase letters ''a'' to ''z'', uppercase letters ''A'' to ''Z'', and [[punctuation symbol]]s. In addition, the original ASCII specification included 33 non-printing [[control code]]s which originated with {{notatypo|[[Teletype Corporation#Teletype Corporation|Teletype model]]}}s; most of these are now obsolete,<ref name="Maini_2007">{{cite book |author-last=Maini |author-first=Anil Kumar |title=Digital Electronics: Principles, Devices and Applications |url=https://books.google.com/books?id=NQSpNAEACAAJ&pg=PA28 |date=2007 |publisher=[[John Wiley and Sons]] |isbn=978-0-470-03214-5 |page=28 |quote=In addition, it defines codes for 33 nonprinting, mostly obsolete control characters that affect how the text is processed.}}</ref> although a few are still commonly used, such as the [[carriage return]], [[line feed]], and [[Tab key#Tab characters|tab]] codes.

 

 

Despite being an American standard, ASCII does not have a code point for the [[Cent (currency)|cent]] (¢). It also does not support [[English terms with diacritical marks]] such as [[résumé]] and [[jalapeño]], or [[proper nouns]] with diacritical marks such as [[Beyoncé]].