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IEEE 1541-2002 is a standard issued in 2002 by the Institute of Electrical and Electronics Engineers (IEEE) concerning the use of prefixes for binary multiples of units of measurement related to digital electronics and computing. While the International System of Units (SI) defines multiples based on powers of ten (like k = 103, M = 106, etc.), a different definition is sometimes used in computing, based on powers of two (like k = 210, M = 220, etc.) This is due to the use of binary addressing for computer memory locations.

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  • IEEE 1541-2002
  • IEEE 1541-2002
  • IEEE 1541
  • IEEE 1541-2002
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  • IEEE 1541-2002 es un estándar utilizado por el Instituto de Ingenieros Eléctricos y Electrónicos (IEEE), sobre el uso de prefijos binarios para los múltiplos de las unidades de medida relacionadas con la electrónica digital y la informática.
  • IEEE 1541—2002 — стандарт Института инженеров электротехники и электроники (IEEE), содержащий рекомендации по применению двоичных приставок единиц измерения в области цифровой и вычислительной техники.
  • IEEE 1541-2002 is a standard issued in 2002 by the Institute of Electrical and Electronics Engineers (IEEE) concerning the use of prefixes for binary multiples of units of measurement related to digital electronics and computing. While the International System of Units (SI) defines multiples based on powers of ten (like k = 103, M = 106, etc.), a different definition is sometimes used in computing, based on powers of two (like k = 210, M = 220, etc.) This is due to the use of binary addressing for computer memory locations.
  • IEEE 1541 è uno standard emanato dall'IEEE riguardante l'uso di prefissi per multipli binari delle unità di misura relative all'elettronica digitale e all'informatica. Mentre il Sistema Internazionale delle unità di misura (SI) definisce multipli (e sottomultipli) basati sulle potenze del dieci (come 103, 106, ecc.), nell'informatica sono di solito preferiti multipli basati sulle potenze del due (come 210, 220, ecc.). Agli inizi questa scelta fu condizionata dall'intrinseca natura binaria dei computer e dei suoi componenti (come le RAM), considerando che l'errore tra 210 = 1024 and 103 = 1000 era abbastanza piccolo per favorire i multipli binari. Così i prefissi SI, come kilo- (k, spesso erroneamente scritto K), mega- (M) e così via, sono stati e sono spesso ancora usati per indicare multi
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  • IEEE 1541-2002 is a standard issued in 2002 by the Institute of Electrical and Electronics Engineers (IEEE) concerning the use of prefixes for binary multiples of units of measurement related to digital electronics and computing. While the International System of Units (SI) defines multiples based on powers of ten (like k = 103, M = 106, etc.), a different definition is sometimes used in computing, based on powers of two (like k = 210, M = 220, etc.) This is due to the use of binary addressing for computer memory locations. In the early years of computing, there was no significant error in using the same prefix for either quantity (210 = 1024 and 103 = 1000 are equal, to two significant figures). Thus, the SI prefixes were borrowed to indicate nearby binary multiples for these computer-related quantities. Meanwhile, manufacturers of storage devices, such as hard disks, traditionally used the standard decimal meanings of the prefixes, and decimal multiples are used for transmission rates and processor clock speeds as well. As technology improved, all of these measurements and capacities increased. As the binary meaning was extended to higher prefixes, the absolute error between the two meanings increased. This has even resulted in litigation against hard drive manufacturers, because some operating systems report the size using the larger binary interpretation. Moreover, there is not a consistent use of the symbols to indicate quantities of bits and bytes — the unit symbol "Mb", for instance, has been widely used for both megabytes and megabits. IEEE 1541 sets new recommendations to represent these quantities and unit symbols unambiguously. After a trial period of two years, in 2005, IEEE 1541-2002 was elevated to a full-use standard by the IEEE Standards Association, and was reaffirmed on 27 March 2008. IEEE 1541 is closely related to Amendment 2 to IEC International Standard IEC 60027-2. The IEC standard was was harmonized into the common ISO/IEC IEC 80000-13:2008 - Quantities and units -- Part 13: Information science and technology. This standard uses 'bit' as the symbol for bit, as opposed to 'b'.
  • IEEE 1541-2002 es un estándar utilizado por el Instituto de Ingenieros Eléctricos y Electrónicos (IEEE), sobre el uso de prefijos binarios para los múltiplos de las unidades de medida relacionadas con la electrónica digital y la informática.
  • IEEE 1541 è uno standard emanato dall'IEEE riguardante l'uso di prefissi per multipli binari delle unità di misura relative all'elettronica digitale e all'informatica. Mentre il Sistema Internazionale delle unità di misura (SI) definisce multipli (e sottomultipli) basati sulle potenze del dieci (come 103, 106, ecc.), nell'informatica sono di solito preferiti multipli basati sulle potenze del due (come 210, 220, ecc.). Agli inizi questa scelta fu condizionata dall'intrinseca natura binaria dei computer e dei suoi componenti (come le RAM), considerando che l'errore tra 210 = 1024 and 103 = 1000 era abbastanza piccolo per favorire i multipli binari. Così i prefissi SI, come kilo- (k, spesso erroneamente scritto K), mega- (M) e così via, sono stati e sono spesso ancora usati per indicare multipli binari delle grandezze relative all'informatica, che non sono grandezze SI. Inoltre non c'è un uso coerente dei simboli per indicare grandezze come bit e byte. IEEE 1541 prescrive nuove raccomandazioni per rappresentare queste grandezze e unità in modo non ambiguo. Dopo un periodo di prova di due anni, nel 2005 IEEE 1541-2002 è stato elevato a uno standard effettivo dall'Associazione per gli standard dell'IEEE; è stato riconfermato come standard in una revisione nel marzo del 2008.
  • IEEE 1541—2002 — стандарт Института инженеров электротехники и электроники (IEEE), содержащий рекомендации по применению двоичных приставок единиц измерения в области цифровой и вычислительной техники.
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