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kibibyte
The kibibyte is a multiple of the unit byte for quantities of digital information. The binary prefix ''kibi'' means 1024, therefore 1 kibibyte is 1024 bytes. The unit symbol for the kibibyte is KiB.
The unit was established by the International Electrotechnical Commission (IEC) in 1998,〔International Electrotechnical Commission (January 1999), IEC 60027-2 ''Amendment 2: Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics''〕 has been accepted for use by all major standards organizations, and is part of the International System of Quantities.〔(【引用サイトリンク】url=http://www.iso.org/iso/catalogue_detail?csnumber=31898 )〕 The kibibyte was designed to replace the kilobyte in those computer science contexts in which the term kilobyte is used to mean 1024 bytes. The interpretation of the kilobyte to denote 1024 bytes, conflicting with the SI definition of the prefix ''kilo'' (1000), is still common, mostly in informal computer science contexts.
==Definition==
:1 kibibyte = 210 bytes = 1024 bytes.
The prefix ''kibi'' is derived as a portmanteau of the words ''kilo'' and ''binary'', indicating its origin in the closeness in value to the SI prefix ''kilo'' (1000). While the SI prefix is written with lowercase (k), all IEC binary prefixes use an uppercase letter.〔(【引用サイトリンク】 title= Prefixes for binary multiples )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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