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ID: 887374
User: 195.84.40.131
Article: Kilobyte
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{{Quantities of bytes}}
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dsjfrewam,dzxcdkfbhfdkjxhgsjdhgsgreiuhuiuheiglh 7]] would divide by 1024 and represent this as "64 KB".<ref>http://support.microsoft.com/kb/121839</ref>
The '''kilobyte''' (symbol: '''kB''')<ref>Note that lowercase "k" is the proper unit symbol for the prefix ''kilo''. Uppercase “K” is properly the unit symbol for the unit of thermodynamic temperature [[kelvin]]. Nonetheless, it is exceedingly common within the computing industry when denoting binary capacity—particularly in marketing literature and product packaging—to use uppercase K and no space (1KB), although “1&nbsp;KB” is not incorrect and is often considered more suitable in technical writing.</ref> is a multiple of the unit [[byte]] for [[Computer data storage|digital information]]. The term ''kilobyte'' and symbol ''kB'' or ''KB'' have historically been used to refer to 1024 (2<sup>10</sup>) bytes. Since the prefix ''kilo-'' means 1000 (10<sup>3</sup>) bytes it is sometimes informally said to be 1000 bytes.<ref>[http://www.askoxford.com/concise_oed/kilobyte?view=uk definition of kilobyte from Oxford Dictionaries Online]. Askoxford.com. Retrieved on 2011-01-07.</ref><ref>[http://www.merriam-webster.com/dictionary/kilobyte Kilobyte – Definition and More from the Free Merriam-Webster Dictionary]. Merriam-webster.com (2010-08-13). Retrieved on 2011-01-07.</ref><ref>[http://dictionary.reference.com/browse/kilobyte Kilobyte | Define Kilobyte at Dictionary.com]. Dictionary.reference.com (1995-09-29). Retrieved on 2011-01-07.</ref>
 
 
For example:
 
* The [[HP 2100|HP 21MX]] real-time computer (1974) denoted 196,608 (which is 192×1024) as "196K",<ref
 
name ="HP21MX">{{Cite journal
 
| last =Frankenberg | first =Robert
 
| title =All Semiconductor Memory Selected for New Minicomputer Series
 
| journal = Hewlett-Packard Journal
 
| volume =26 | issue =2 | pages = pg 15–20 | publisher = Hewlett-Packard | month = October | year = 1974
 
| url = http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1974-10.pdf
 
| accessdate = 2007-06-18
 
| quote = 196K-word memory size
 
|format=PDF}}</ref> while the [[HP 3000]] business computer (1973) denoted 131,072 (which is 128×1024) as "128K".<ref
 
name="HP3000">{{Cite journal
 
| last = Hewlett-Packard
 
| title =HP 3000 Configuration Guide
 
| journal = HP 3000 Computer System and Subsystem Data
 
| pages = pg 59 |date = November 1973| url = http://www.bitsavers.org/pdf/hp/3000/hp3000/5952-4500_optionsBrochure_Nov73.pdf
 
|format=PDF|accessdate=2010-01-22}}</ref>
 
* The [[Shugart Associates|Shugart]] SA-400 5{{1/4}}-inch [[floppy disk]] (1976) held 109,375 bytes unformatted,<ref>http://www.swtpc.com/mholley/SA400/SA400_Index.htm</ref> and was advertised as "110 Kbyte", using the 1000 convention.<ref>http://www.swtpc.com/mholley/SA400/SA400_Datasheet.pdf</ref> Likewise, the 8-inch [[Digital Equipment Corporation|DEC]] RX01 floppy (1975) held 256,256 bytes formatted, and was advertised as "256k".<ref>http://bitsavers.org/pdf/dec/disc/rx01/EK-RX01-MM-002_maint_Dec76.pdf</ref> On the other hand, the [[Tandon Corporation|Tandon]] 5{{1/4}}-inch [[double density|DD]] floppy format (1978) held 368,640 bytes, but was advertised as "360 KB", following the 1024 convention.
 
* On modern systems, [[Mac OS X Snow Leopard]] represents a 65,536 byte file as "66 KB",<ref>http://support.apple.com/kb/TS2419</ref> rounding to the nearest 1000, while [[Microsoft Windows 7]] would divide by 1024 and represent this as "64 KB".<ref>http://support.microsoft.com/kb/121839</ref>
 
 
In December 1998, the [[International Electrotechnical Commission|IEC]] attempted to address these dual definitions of the conventional prefixes by proposing unique [[binary prefixes]] and prefix symbols to denote multiples of 1024, such as “[[kibibyte]] (KiB)”, which exclusively denotes 2<sup>10</sup> or 1024 bytes.<ref>{{citeweb|url=http://physics.nist.gov/cuu/Units/binary.html|title=Prefixes for binary multiples|author=[[National Institute of Standards and Technology]]}} "In December 1998 the [[International Electrotechnical Commission]] (IEC) [...] approved as an IEC International Standard names and symbols for prefixes for binary multiples for use in the fields of data processing and data transmission."</ref> If the proposal had been widely and consistently adopted, it would have liberated the standard unit prefixes to unambiguously refer only to their strict decimal definitions wherein ''kilobyte'' would be understood to represent only 1000 bytes. However, in the over{{nbhyph}}{{Time ago|Dec 1 1998|min_magnitude=years|ago=}} that have since elapsed, the proposal has seen little adoption by the computer industry.<ref>''Upgrading and Repairing PCs'', Scott Mueller, Pg. 596, ISBN 0789729741</ref><ref>''The silicon web: physics for the Internet age'', Michael G. Raymer, Pg. 40, ISBN 9781439803110</ref><ref>[http://www-cs-staff.stanford.edu/~knuth/news99.html Knuth: Recent News]. Cs-staff.stanford.edu. Retrieved on 2011-01-07.</ref><ref>Atwood, Jeff. (2007-09-10) [http://www.codinghorror.com/blog/2007/09/gigabyte-decimal-vs-binary.html Gigabyte: Decimal vs. Binary]. Coding Horror. Retrieved on 2011-01-07.</ref>
 
   
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==Examples of use==
 
==Examples of use==
 
*1 kilobyte: (very) short story
 
*1 kilobyte: (very) short story
Reason: ANN scored at 0.907024
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Status: Reported
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