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Encyclopedia > Kilooctet
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Quantities of bytes
SI prefixes Binary prefixes
Name
(Symbol)
Standard
SI
Alternate
Use
Name
(Symbol)
Value
kilobyte (kB) 103 210 kibibyte (KiB) 210
megabyte (MB) 106 220 mebibyte (MiB) 220
gigabyte (GB) 109 230 gibibyte (GiB) 230
terabyte (TB) 1012 240 tebibyte (TiB) 240
petabyte (PB) 1015 250 pebibyte (PiB) 250
exabyte (EB) 1018 260 exbibyte (EiB) 260
zettabyte (ZB) 1021 270 zebibyte (ZiB) 270
yottabyte (YB) 1024 280 yobibyte (YiB) 280

A kilobyte (derived from the SI prefix kilo-, meaning 1000) is a unit of information or computer storage equal to either 1000 or 1024 bytes. It is commonly abbreviated KB, kB, Kbyte or kbyte. Because of a traditional inconsistency, "kilobytes" are often intended to mean kibibytes in common speech. This usage is not recommended as it creates confusion (see below) and has been facing increasing opposition by many technical standards and legal entities in the past few years. A byte is commonly used as a unit of storage measurement in computers, regardless of the type of data being stored. ... An SI prefix is a prefix that can be applied to an SI unit to form a decimal multiple (supramultiple or submultiple). ... In computing, binary prefixes can be used to quantify large numbers where powers of two are more useful than powers of ten. ... Cover of brochure The International System of Units. ... In computing, binary prefixes can be used to quantify large numbers where powers of two are more useful than powers of ten. ... A kibibyte (a contraction of kilo binary byte) is a unit of information or computer storage, commonly abbreviated KiB (never kiB). 1 kibibyte = 210 bytes = 1,024 bytes The kibibyte is closely related to the kilobyte, which can be used either as a synonym for kibibyte or to refer to... A megabyte is a unit of information or computer storage equal to approximately one million bytes. ... A mebibyte (a contraction of mega binary byte) is a unit of information or computer storage, abbreviated MiB. 1 MiB = 220 bytes = 1,048,576 bytes = 1,024 kibibytes The mebibyte is closely related to the megabyte (MB), which can either be a synonym for mebibyte, or refer to 106... A gigabyte (derived from the SI prefix giga-) is a unit of information or computer storage equal to one billion (that is, a thousand million) bytes. ... A gibibyte is a unit of information or computer storage. ... A terabyte (derived from the prefix tera-) is a measurement term for data storage capacity equal to 1000 gigabytes, i. ... A tebibyte is a unit of information or computer storage, commonly abbreviated TiB. 1 tebibyte = 240 bytes = 1,099,511,627,776 bytes The tebibyte is closely related to the terabyte, which can either be a synonym for tebibyte, or refer to 1012 bytes = 1,000,000,000,000 bytes... A petabyte (derived from the SI prefix peta- ) is a unit of information or computer storage equal to one quadrillion bytes. ... A pebibyte is a unit of information or computer storage. ... An exabyte (derived from the SI prefix exa-) is a unit of information or computer storage equal to approximately one quintillion bytes. ... An exbibyte (a contraction of exa binary byte) is a unit of information or computer storage, abbreviated EiB. 1 exbibyte = 260 bytes = 1,152,921,504,606,846,976 bytes = 1,024 pebibytes The exbibyte is closely related to the exabyte, which can either be a synonym for exbibyte, or... A zettabyte (derived from the SI prefix zetta-) is a unit of information or computer storage equal to one sextillion (one long scale trilliard) bytes. ... A zettabyte (derived from the SI prefix zetta-) is a unit of information or computer storage equal to one sextillion (one long scale trilliard) bytes. ... A yottabyte (derived from the SI prefix yotta-) is a unit of information or computer storage equal to one septillion (one long scale quadrillion or 1024) bytes. ... A yobibyte (a contraction of yotta binary byte) is a unit of information or computer storage, commonly abbreviated YiB. 1 yobibyte = 280 bytes = 1,208,925,819,614,629,174,706,176 bytes = 1,024 zebibytes The yobibyte is closely related to the yottabyte, which can either be a synonym... An SI prefix is a prefix that can be applied to an SI unit to form a decimal multiple (supramultiple or submultiple). ... Kilo (symbol: k) is a prefix in the SI system denoting 103 or 1000. ... Information is the result of processing, manipulating and organizing data in a way that adds to the knowledge of the person receiving it. ... This article or section does not cite its references or sources. ... A byte is commonly used as a unit of storage measurement in computers, regardless of the type of data being stored. ... A kibibyte (a contraction of kilo binary byte) is a unit of information or computer storage, commonly abbreviated KiB (never kiB). 1 kibibyte = 210 bytes = 1,024 bytes The kibibyte is closely related to the kilobyte, which can be used either as a synonym for kibibyte or to refer to...


The term "kilobyte" was first used to refer to a value of 1024 bytes (210), because the binary nature of digital computers lends itself to quantities that are powers of two, and 210 is roughly one thousand. As computers became more widely used, this misuse (according to the BIPM) of the SI prefix spread from the jargon of computer professionals into the mainstream lexicon, creating much confusion. See binary prefix for more details. The binary numeral system (base 2 numerals) represents numeric values using two symbols, typically 0 and 1. ... A digital system is one that uses discrete values (often electrical voltages), especially those representable as binary numbers, or non-numeric symbols such as letters or icons, for input, processing, transmission, storage, or display, rather than a continuous spectrum of values (ie, as in an analog system). ... A BlueGene supercomputer cabinet. ... In mathematics, a power of two is any of the nonnegative integer powers of the number two; in other words, two times itself a certain number of times. ... The Bureau International des Poids et Mesures (International Bureau of Weights and Measures, or BIPM) is a standards organization, one of the three organizations established to maintain the SI system under the terms of the Metre Convention. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Look up lexicon in Wiktionary, the free dictionary. ... In computing, binary prefixes can be used to quantify large numbers where powers of two are more useful than powers of ten. ...


Some have suggested that the capitalized prefix K should be used to distinguish this quantity from the SI prefix k, and although this has never been formally mandated, it is commonly practised (even though K is already used as the SI symbol for kelvins). However, it is not extensible to the higher-order prefixes, as SI already uses the prefixes m and M to mean "thousandth" and "million" respectively. There are also proposals to capitalize all greater-than-unity prefixes (D, H, K, M, G, ...), which would conflict with this. See SI prefix. Majuscules or capital letters (in the Roman alphabet: A, B, C, ...) are one type of case in a writing system. ... The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero—the lowest possible temperature where nothing could be colder and no heat energy remains in a substance—is defined as zero kelvin (0 K). ... Cover of brochure The International System of Units. ... An SI prefix is a prefix that can be applied to an SI unit to form a decimal multiple (supramultiple or submultiple). ...


These prefixes can therefore be used with either decimal (powers of 1000) or binary (powers of 1024) values, depending on context:

  • 1024 bytes (210): This definition is always used to express memory capacity, and other quantities which are based on powers of two. Most software also uses it to express storage capacity. This definition has been expressly forbidden by the SI standard ([1] section 3.1, marginal note), and, since 1998, most standards organizations instead recommend the term kibibyte (KiB). Although the word "kibibyte" is seldom seen in practice, it is starting to be adopted by software in which precision is important, such as BitTorrent or the Linux kernel. [2]
  • 1000 bytes (103): This definition is consistent with the SI prefix, and is recommended for all uses by international standards organizations such as IEC, IEEE, and ISO, with the abbreviation "kB". The overwhelming popularity of the 1024 definition means that anyone using "kilobyte" to mean 1000 in these situations is likely to cause confusion. However, it is common to use 1000 when deriving kilobyte measures from quantities which are not based on powers of two, such as bitrates.

Compare with kilobit, which is more frequently used with the decimal meaning. Standards Organizations are bodies, organizations and institutions that produce, and in some cases measure, standards. ... A kibibyte (a contraction of kilo binary byte) is a unit of information or computer storage, commonly abbreviated KiB (never kiB). 1 kibibyte = 210 bytes = 1,024 bytes The kibibyte is closely related to the kilobyte, which can be used either as a synonym for kibibyte or to refer to... It has been suggested that this article be split into multiple articles accessible from a disambiguation page. ... The Linux kernel is a Unix-like operating system kernel. ... The initials IEC can stand for: Independent Electoral Commission Industrial Emergency Council Inertial electrostatic confinement (in fusion energy) Institut des Experts-comptables et des Conseils fiscaux Institut dEstudis Catalans, Catalan Studies Institute Interactive Evolutionary Computation International Education Centre International Electrical Congress International Electrotechnical Commission See also IEC connector for... The Institute of Electrical and Electronics Engineers or IEEE (pronounced as eye-triple-ee) is an international non-profit, professional organization incorporated in the State of New York, United States. ... The International Organization for Standardization (ISO) is an international standard-setting body composed of representatives from national standards bodies. ... In telecommunications and computing, bitrate (sometimes written bit rate, data rate or as a variable Rbit) is the number of bits that are conveyed or processed per unit of time. ... A kilobit is a unit of information storage, abbreviated kbit or sometimes kb. ...


See also


  Results from FactBites:
 
Octet - Wikipédia (2205 words)
Par convention, de manière erronée selon le SI, et avant la normalisation de 1998, on utilise les unités dérivées que sont le kilooctet, le megaoctet, le gigaoctet pour représenter les valeurs suivantes en puissance de 2 :
La langue française pose aussi un problème de syntaxe, relative à la prononciation de la voyelle initiale du mot octet avec un préfixe ; aussi, voit-on les formes suivantes, avec ou sans la majuscule sur le préfixe : « kilo-octet » (avec trait d'union), « kilooctet » (sans trait d'union) ou « kiloctet » (fusion des voyelles) dans la littérature.
On effectue le même raisonnement pour la capacité des supports statiques de stockage, en considérant que chaque position de la longueur (ou resp.
  More results at FactBites »

 
 

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