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字节

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字节的次方单位
十进制前缀
(SI)
名字 缩写 次方
千字节 KB 103
兆字节 MB 106
吉字节 GB 109
太字节 TB 1012
拍字节 PB 1015
艾字节 EB 1018
泽字节 ZB 1021
尧字节 YB 1024
二进制前缀
(IEC 60027-2)
名字 缩写 次方
kibibyte KiB 210
mebibyte MiB 220
gibibyte GiB 230
tebibyte TiB 240
pebibyte PiB 250
exbibyte EiB 260
zebibyte ZiB 270
yobibyte YiB 280

字节(港澳台作位元組英语:Byte),通常用作计算机信息计量单位,不分数据类型。[1][2] 一個字节代表八個比特(港澳台作位元英语:Bit)。是程序设计语言不可缺少的基本数据类型——整数

字节是现代计算机中连续的、固定数量的比特(二進制),即八個位元為一字节。

八个二进位经常在规范中被称为Octet(八位组),例如在一些工业标准、网络电信技术裡。

Byte(字节)可缩写成B,例如MB表示Megabyte;Bit(位元)可缩写成b(小写),例如Mb表示Megabit英语Megabit

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參考資料[编辑]

  1. ^ Blaauw, Gerrit Anne; Brooks, Jr., Frederick Phillips; Buchholz, Werner, 4: Natural Data Units, (编) Buchholz, Werner, Planning a Computer System – Project Stretch (PDF), McGraw-Hill Book Company, Inc. / The Maple Press Company, York, PA.: 39–40, 1962 [2017-04-03], LCCN 61-10466, (原始内容存档 (PDF)于2017-04-03), […] Terms used here to describe the structure imposed by the machine design, in addition to bit, are listed below.
    Byte denotes a group of bits used to encode a character, or the number of bits transmitted in parallel to and from input-output units. A term other than character is used here because a given character may be represented in different applications by more than one code, and different codes may use different numbers of bits (i.e., different byte sizes). In input-output transmission the grouping of bits may be completely arbitrary and have no relation to actual characters. (The term is coined from bite, but respelled to avoid accidental mutation to bit.)
    A word consists of the number of data bits transmitted in parallel from or to memory in one memory cycle. Word size is thus defined as a structural property of the memory. (The term catena was coined for this purpose by the designers of the Bull fr computer.)
    Block refers to the number of words transmitted to or from an input-output unit in response to a single input-output instruction. Block size is a structural property of an input-output unit; it may have been fixed by the design or left to be varied by the program. […]
     
  2. ^ Bemer, Robert William, A proposal for a generalized card code of 256 characters, Communications of the ACM, 1959, 2 (9): 19–23, doi:10.1145/368424.368435 

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