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Topic: IEC 60027 2


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In the News (Tue 17 Nov 09)

  
  Encyclopedia: Gigabyte
A gigabit, which should not be confused with gigabyte, is 1/8th of a gigabyte and is mainly used to describe bandwidth, e.g.
2 gigabit/s is the speed of current Fibre Channel interfaces.
To clarify the distinction between decimal and binary prefixes, in 1997 the International Electrotechnical Commission (IEC), a standards body, proposed conformity with the International System of Units (SI) conventions (standard IEC 60027-2).
www.nationmaster.com /encyclopedia/Gigabyte   (1846 words)

  
 Binary prefix - the free encyclopedia   (Site not responding. Last check: 2007-09-09)
In 1999, the International Electrotechnical Commission (IEC) published Amendment 2 to "IEC60027-2: Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics".
It also clarifies that,from the point of view of the IEC, the SI prefixes only have their base-10 meaning and never have a base-2 meaning.
Note that the IEC names are defined only up to exbi-, corresponding to the SI prefix exa-.
www.encyclopedia-of-knowledge.com /?t=Exbi   (957 words)

  
 Encyclopedia: Binary prefix
It also clarifies that, from the point of view of the IEC, the SI prefixes only have their base-10 meaning and never have a base-2 meaning.
Sectors are intended for direct transfer to RAM, which comes in powers of two, so sector size itself is almost always a power of two (some early 1960s sectors measured 100 bytes [2]).
IEC 60027 (formerly IEC 27) is the International Electrotechnical Commissions standard on Letter symbols to be used in electrical technology.
www.nationmaster.com /encyclopedia/Binary-prefix   (4530 words)

  
 Gigabyte   (Site not responding. Last check: 2007-09-09)
This is the definition most often used in computer science, computer programming and almost all computer operating systems.
A gigabit, which should not be confused with gigabyte, is 1/8th of a gigabyte andis mainly used to describe bandwidth, e.g.
To clarify the distinction between decimal and binary prefixes, the International Electrotechnical Commission (IEC), astandards body, in 1997 proposed short unions of the International System of Units (SI)prefixes with the word "binary".
www.therfcc.org /gigabyte-22807.html   (278 words)

  
 Definitions of the SI units: The binary prefixes
In December 1998 the International Electrotechnical Commission (IEC), the leading international organization for worldwide standardization in electrotechnology, 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.
The full content of Amendment 2, which has a publication date of 1999-01, is reflected in the tables above and the suggestion regarding pronunciation.
Subsequently the contents of this Amendment were incorportated in the second edition of IEC 60027-2, which has a publication date of 2000-11 (the first edition was published in 1972).
physics.nist.gov /cuu/Units/binary.html   (562 words)

  
 IEC - IEC in action | SI zone > Prefixes for binary multiples
The answers are all in IEC 60027-2, developed by TC 25 (Quantities and units, and their letter symbols), published in November 2000 and now gradually being adopted in the IT world.
The second edition of IEC 60027-2 (Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics, to give it its full title) was developed specifically to meet industry’s expressed needs in data processing and data transmission.
The new prefixes and symbols for binary multiples standardized in IEC 60027-2 are not part of the SI metric system of units.
www.iec.ch /zone/si/si_bytes.htm   (1023 words)

  
 Binary prefix - Wikipedia   (Site not responding. Last check: 2007-09-09)
In 1999, the International Electrotechnical Commission (IEC) published Amendment 2 to "IEC 60027-2: Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics".
The names come from shortened versions of the original SI prefixes and bi which is short for binary.
The IEC did not give names for the prefixes beyond exa-, but if they had given them names, they would probably be zebi- and yobi-.
wikipedia.findthelinks.com /pe/Pebi.html   (457 words)

  
 Info Node: (coreutils.info)Block size   (Site not responding. Last check: 2007-09-09)
A block size specification can be a positive integer specifying the number of bytes per block, or it can be `human-readable' or `si' to select a human-readable format.
Integers may be followed by suffixes that are upward compatible with the SI prefixes (http://www.bipm.fr/enus/3_SI/si-prefixes.html) for decimal multiples and with the IEC 60027-2 prefixes for binary multiples (http://physics.nist.gov/cuu/Units/binary.html).
(`Zi' is a GNU extension to IEC 60027-2.) `YB' yottabyte: 10^24 = 1,000,000,000,000,000,000,000,000.
cvs.lp.se /cgi-bin/info2www?(coreutils)Block+size   (537 words)

  
 Gigabyte - Freepedia   (Site not responding. Last check: 2007-09-09)
The IEC recommends that this unit should instead be called a gibibyte (abbreviated GiB), as it conflicts with SI units used for bus speeds and the like.
To clarify the distinction between decimal and binary prefixes, in 1997 the International Electrotechnical Commission (IEC), a standards body, proposed complete conformity with the International System of Units (SI) conventions (standard IEC 60027-2).
Although most hard disk manufacturers' definition of GB is 1,000,000,000 bytes (only computer memory has a natural inclination towards units that are powers of 2), most computer operating systems use the 1,073,741,824 byte definition.
en.freepedia.org /Gigabyte.html   (488 words)

  
 IEC prefixes and symbols for binary multiples
In 1998 the 7th edition of the SI Brochure was published, which included a marginal note, explicitly stating that SI prefixes should not be used to indicate powers of 2.
In December 1998 the International Electrotechnical Commission (IEC), the international organization for worldwide standardization in electrotechnology, approved as an IEC International Standard the names and symbols for prefixes for binary multiples for use in the fields of data processing and data transmission.
These prefixes for binary multiples, which were developed by IEC Technical Committee (TC) 25, Quantities and Units, and Their Letter Symbols, with the strong support of CIPM, IEEE and ISO, were first adopted by the IEC as
members.optusnet.com.au /alexey/prefBin.xhtml   (951 words)

  
 IEC - OneLook Dictionary Search
IEC : Stammtisch Beau Fleuve Acronyms [home, info]
IEC : Dictionary of Computing and Digital Media [home, info]
Phrases that include IEC: dod iec, iec / i.e.c, iec 559, iec 60027-2, iec 60027 2, more...
www.onelook.com /cgi-bin/cgiwrap/bware/dofindf.cgi?word=IEC   (140 words)

  
 Binary prefix -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-09-09)
They are commonly written and pronounced identically to the (additional info and facts about SI prefix) SI prefixes, but each successive prefix is multiplied by 1024 (2
In 1999, the (additional info and facts about International Electrotechnical Commission) International Electrotechnical Commission (IEC) published Amendment 2 to "IEC 60027-2: Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics".
Note that the IEC names are defined only up to exbi-, corresponding to the (additional info and facts about SI prefix) SI prefix exa-.
www.absoluteastronomy.com /encyclopedia/b/bi/binary_prefix.htm   (1311 words)

  
 Binary prefix - Wikipedia, the free encyclopedia
We will use the phrase "decimal unit" to mean "SI designation understood in its standard, decimal, power-of-1000 sense" and "binary unit" to mean "SI designation understood in its traditional computer-industry, binary, power-of-1024 sense." We will also use the computer-industry conventions B for byte (despite B being the official, but rarely-used SI symbol for bel).
In September of 2003, Lanchau Dan, Adam Selkowitz, Tim Swan and John Zahabian filed a lawsuit against Dell, Inc., Apple Computer Inc., Gateway, Inc., Hewlett-Packard Co., IBM Corp., Sharp Corporation, Sony Corp. and Toshiba Corp claiming their advertising deceptively exaggerates the real capacity of their hard drives.
This page was last modified 18:36, 23 November 2005.
en.wikipedia.org /wiki/Binary_prefix   (1516 words)

  
 Műszerügyi és Méréstechnikai Közlemények 2001. 37. évf. 67. szám - Elektronikus Periodika Archívum
Az eredeti közlemény az IEC 60027-2 kiadvány második módosításában (Amendment 2) jelent meg: Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics címen, az 1999-01-es dokumentumként.
Hivatkozik a már említett IEC 60027-2 szabványajánlásra, amely ugyan még nem kötelező érvényű, de elfogadott ajánlásként tűnteti fel.
[3] IEC 60027-2 kiadvány (Amendment 2): Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics, 1999.
epa.oszk.hu /00000/00025/00003/lambert.html   (1525 words)

  
 Metric Interchange Format
In December 1998 the International Electrotechnical Commission (IEC) approved as an IEC International Standard [IEC 60027-2] names and symbols for prefixes for binary multiples for use in the fields of data processing and data transmission.
As of 2000, the units bit and byte have not been accepted for use with SI, but are in widespread use.
The IEC symbols are "B" for byte and "bit" for bit.
www-swiss.ai.mit.edu /~jaffer/MIXF.html   (1795 words)

  
 GNU Core-utils: Block size   (Site not responding. Last check: 2007-09-09)
Integers may be followed by suffixes that are upward compatible with the SI prefixes for decimal multiples and with the IEC 60027-2 prefixes for binary multiples.
' and the IEC 60027-2 prefix is `
' is a GNU extension to IEC 60027-2.)
www.gnu.org /software/coreutils/manual/html_node/coreutils_4.html   (383 words)

  
 IEC-Normen - Normenrecherche - Suchergebnisse-
Amendment 2 - Letter symbols to be used in electrical technology - Part 1: General
Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics
Letter symbols to be used in electrical technology - Part 3: Logarithmic and related quantities, and their units
www.iec-normen.de /shop/searchresult.php?SearchResultMin=1&committee=25   (78 words)

  
 Binary prefix at opensource encyclopedia   (Site not responding. Last check: 2007-09-09)
As of 2004 this naming convention has not yet gained widespread use.
Note that the IEC names extend only up to "exbi-", corresponding to the SI prefix exa-.
Extending the apparent naming pattern used by the IEC suggests zebi- and yobi- as candidate names for 2
www.springknow.com /Kibi.html   (819 words)

  
 The world's top binary prefix websites
But when attempting to apply these SI units in practice, problems are encountered.
For example, one kilobyte (in the conventional sense) is equal to 2
If one wanted to express 1000 bytes (the SI kilobyte) the value of x must be approximately 9.9657843 (7 decimal places), obviously this number is very difficult to work with and shows that SI units do not simplify matters.
dirs.org /wiki-article-tab.cfm/binary_prefix   (796 words)

  
 Voorvoegsels   (Site not responding. Last check: 2007-09-09)
Amendment 2 van IEC 60027-2 (International Electrotechnical Commission) stelt voor de termen kibi...exbi te gebruiken.
Staat er in zo'n geval KB of MB, dus zonder de seconde, dan wil dat doorgaans zeggen dat de schrijver niet weet waar hij het over heeft!
Een transportsnelheid, opgegeven als 1 KB/s, zou moeten betekenen 1 Kilobyte/s of volgens IEC: 1 kibibyte/s, dus 1024 byte per seconde.
home.hetnet.nl /~vanadovv/Voorv.html   (145 words)

  
 Data units - AzureusWiki
However, computer people found it far more important to talk about 1024 somethings, because that a number that's convenient for computers to talk about; it's 2^10 (2 to the 10th power, or 2 raised to the 10).
In more recent years, it became sufficiently important to talk in terms of 1000s and 1024s of units separately, so the distinction between k and K, m and M, etc was born.
This page was last modified 16:19, 2 October 2005.
azureus.aelitis.com /wiki/index.php/Data_units   (376 words)

  
 glossaire les unites de mesures en informatique   (Site not responding. Last check: 2007-09-09)
En effet les organismes internationaux (IEC, International Electronical Commission) ont décidé qu'un kilo-octets valait désormais 1.000 octets.
internationale (CEI / IEC - !http://www.iec.ch) avec l'encouragement du Comité international des poids et mesures (CIPM http://www.bipm.fr/fra/2_Committees/cipm.html) et de l'Institute of Electrical and Electronics Engineers (IEEE - !http://www.ieee.org) ont
électrotechnique - Deuxième partie : Télécommunications et électronique (International Standard IEC 60027-2: Letter symbols to be used in
www.cornil.com /pbm.htm   (271 words)

  
 ComputerBase - Lexikon: Binärpräfixe   (Site not responding. Last check: 2007-09-09)
1999 hat die International Electrotechnical Commission (IEC) ihr Amendment 2 to "IEC 60027-2: Letter symbols to be used in electrical technology – Part 2: Telecommunications and electronics" veröffentlicht.
Dieser Zusatz ist in der nächsten Ausgabe des Standards enthalten: "IEC 60027-2 (2000-11) Ed.
) haben keine entprechenden IEC-Binärpräfixe, obwohl eine offensichtliche Möglichkeit zebi- (Zi = 2
www.computerbase.de /lexikon/Binary_Byte   (459 words)

  
 Linux: Megabytes (MB) or Mebibytes (MiB)?   (Site not responding. Last check: 2007-09-09)
Eric has decided to follow the following standard:
IEC 60027-2, Second edition, 2000-11, Letter symbols to be used in electrical
technology - Part 2: Telecommunications and electronics and has changed all
kerneltrap.org /node/view/340   (2259 words)

  
 Kibibit, Mebibyte!   (Site not responding. Last check: 2007-09-09)
Deshalb hat die Internationale Elektrotechnische Kommission (IEC) in der Neufassung der Norm IEC 60027-2:2000 (Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics) neue Vorsätze für "binäre Vielfache" festgelegt.
Die Internationale Norm IEC 60027-2:2000-11 ist vom Europäischen Komitee für Elektrotechnische Normung (CENELEC) als Harmonisierungsdokument HD 60027-2:2003-03 (das in deutscher, englischer und französischer Textversion vorliegt) übernommen worden.
Die folgende Tabelle gibt die neuen Vorsätze wieder:
home.arcor.de /lutz.schweizer/mebibyte.html   (195 words)

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