Editing Byte (section)

=== Units based on powers of 2 ===
A system of units based on [[powers of 2]] in which 1 kibibyte (KiB) is equal to 1,024 (i.e., 2<sup>10</sup>) bytes is defined by international standard IEC&nbsp;80000-13 and is supported by national and international standards bodies ([[BIPM]], [[International Electrotechnical Commission|IEC]], [[NIST]]). The IEC standard defines eight such multiples, up to 1 yobibyte (YiB), equal to 1024<sup>8</sup> bytes. The natural binary counterparts to ''ronna-'' and ''quetta-'' were given in a consultation paper of the International Committee for Weights and Measures' Consultative Committee for Units (CCU) as ''robi-'' (Ri, 1024<sup>9</sup>) and ''quebi-'' (Qi, 1024<sup>10</sup>), but have not yet been adopted by the IEC or ISO.<ref>{{cite journal |last1=Brown |first1=Richard J. C. |date=27 April 2022 |title=Reply to "Facing a shortage of the Latin letters for the prospective new SI symbols: alternative proposal for the new SI prefixes" |url= |journal=Accreditation and Quality Assurance |volume=27 |issue= 3|pages=143–144 |doi=10.1007/s00769-022-01499-7 |s2cid=248397680 |access-date=}}</ref>

An alternative system of nomenclature for the same units (referred to here as the ''customary convention''), in which 1 ''kilobyte'' (KB) is equal to 1,024 bytes,<ref>[http://www.merriam-webster.com/dictionary/kilobyte Kilobyte – Definition and More from the Free Merriam-Webster Dictionary] {{webarchive|url=https://web.archive.org/web/20100409171320/http://www.merriam-webster.com/dictionary/kilobyte |date=2010-04-09 }}. Merriam-webster.com (2010-08-13). Retrieved on 2011-01-07.</ref><ref>[http://dictionary.reference.com/browse/kilobyte Kilobyte – Definition of Kilobyte at Dictionary.com] {{webarchive|url=https://web.archive.org/web/20100901202451/http://dictionary.reference.com/browse/kilobyte |date=2010-09-01 }}. Dictionary.reference.com (1995-09-29). Retrieved on 2011-01-07.</ref><ref>[http://www.askoxford.com/concise_oed/kilobyte?view=uk Definition of kilobyte from Oxford Dictionaries Online] {{webarchive|url=https://web.archive.org/web/20060625132017/http://www.askoxford.com/concise_oed/kilobyte?view=uk |date=2006-06-25 }}. Askoxford.com. Retrieved on 2011-01-07.</ref> 1 ''megabyte'' (MB) is equal to 1024<sup>2</sup> bytes and  1 ''gigabyte'' (GB) is equal to 1024<sup>3</sup> bytes is mentioned by a 1990s [[JEDEC]] standard. Only the first three multiples (up to GB) are mentioned by the JEDEC standard, which makes no mention of TB and larger. While confusing and incorrect,<ref>[https://www.hpe.com/psnow/resources/ebooks/a00113994en_us_v2/Prefixes_for_Binary_and_Decimal_Multiples.html Prefixes for Binary and Decimal Multiples: Binary versus decimal]</ref> the customary convention is used by the [[Microsoft Windows]] operating system<ref name="auto">{{cite web |url=http://support.microsoft.com/kb/121839 |title=Determining Actual Disk Size: Why 1.44&nbsp;MB Should Be 1.40&nbsp;MB |publisher=Microsoft Support |date=2003-05-06 |access-date=2014-03-25 |url-status=live |archive-url=https://web.archive.org/web/20140209012305/http://support.microsoft.com/kb/121839 |archive-date=2014-02-09 }}</ref>{{Better source needed|reason=Source is nearly 20 years old and may not reflect recent versions of Windows; need a newer reference.|date=January 2022}} and [[random-access memory]] capacity, such as main memory and [[CPU cache]] size, and in marketing and billing by telecommunication companies, such as [[Vodafone]],<ref>{{cite web|publisher=Vodafone Ireland |title=3G/GPRS data rates |url=https://www.vodafone.ie/planscosts_bus/data/|access-date=26 October 2016 |url-status=live |archive-url=https://web.archive.org/web/20161026232743/https://www.vodafone.ie/planscosts_bus/data/ |archive-date=26 October 2016}}</ref> [[AT&T]],<ref>{{cite web |publisher=AT&T |title=Data Measurement Scale |url=http://www.att.com/support_static_files/KB/KB24648.html |access-date=26 October 2016 }}{{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> [[Orange S.A.|Orange]]<ref>{{cite web|publisher=Orange Romania|title=Internet Mobile Access|url=https://www.orange.ro/recharge/internet.html|access-date=26 October 2016|url-status=dead |archive-url=https://web.archive.org/web/20161026234911/https://www.orange.ro/recharge/internet.html |archive-date=26 October 2016}}</ref> and [[Telstra]].<ref>{{cite web|publisher=Telstra|title=Our Customer Terms|page=7|url=https://www.telstra.com.au/content/dam/tcom/personal/consumer-advice/pdf/intl-roaming.pdf|access-date=26 October 2016|url-status=live|archive-url=https://web.archive.org/web/20170410020355/https://www.telstra.com.au/content/dam/tcom/personal/consumer-advice/pdf/intl-roaming.pdf|archive-date=10 April 2017}}</ref>

For [[Computer data storage|storage]] capacity, the customary convention was used by macOS and iOS through Mac OS X 10.5 Leopard and iOS 10, after which they switched to units based on powers of 10.<ref name="apple"/>