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A kilobyte (derived from the SI prefix kilo-, meaning 1,000) is a unit of information or computer storage equal to either 1,024 bytes (210) or 1,000 bytes (103), depending on context. A bit is a binary digit, taking a value of either 0 or 1 Binary digits are a basic unit of Information storage and communication A byte (pronounced "bite" baɪt is the basic unit of measurement of information storage in Computer science. An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol to form a Decimal multiple or Kilo- (symbol k is a prefix in the SI and other systems of units denoting 103 or 1000 Mega- (symbol M) is an SI prefix in the SI system of units denoting a factor of 106, 1000000 (one Million For other meanings see Giga (disambiguation Giga- (symbol G is a prefix in the SI system of units denoting 109 teras- (symbol T) is a prefix in the SI system of units denoting 1012, or 1000000000000 (1 trillion In Physics and Mathematics, peta- (symbol P) is a prefix in the SI ( System of units) denoting 1015 exa- (symbol E) is a prefix in the SI system of units denoting 1018 or 1 000 000 000 000 000 000 zetta- (symbol Z) is an SI prefix in the SI ( System of units) denoting 1021 or 1 000 000 000 000 000 000 000 yotta- (symbol Y) is an SI prefix in the SI ( System of units) denoting 1024 or 1 000 000 000 000 000 000 000 000 IEC 60027 (formerly IEC 27) is the International Electrotechnical Commission 's standard on Letter symbols to be used in electrical technology. JEDEC Solid State Technology Association, formerly known as J oint E lectron D evice E ngineering C ouncil ( JEDEC) or Joint An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol to form a Decimal multiple or 943 KILO is a radio station sponsored out of Colorado Springs and Pueblo, Colorado. Information as a concept has a diversity of meanings from everyday usage to technical settings Computer data storage, often called storage or memory, refers to Computer components devices and recording media that retain digital A byte (pronounced "bite" baɪt is the basic unit of measurement of information storage in Computer science. A byte (pronounced "bite" baɪt is the basic unit of measurement of information storage in Computer science.
It is abbreviated in a number of ways: kB, KB, K and Kbyte.
Ambiguity
The exact number of bytes in a kilobyte has traditionally been ambiguous. In computing binary prefixes are names or associated symbols that can precede a unit of measure (such as a Byte) to indicate multiplication by a power of two Locations in electronic memory circuits are identified by binary numbers, which means that the number of addressable locations naturally becomes a power of 2, and memory sizes are therefore not integer multiples (or fractions) of 1000. The binary numeral system, or base-2 number system, is a Numeral system that represents numeric values using two symbols usually 0 and 1. In Mathematics, a power of two is any of the Integer powers of the number two; in other words two multiplied by itself a certain However, as 210 = 1024 ≈ 1000, the established 'k' (for kilo) was early on employed as a convenient "approximate" prefix for memory capacities in multiples of 1024. On the other hand, for products where (some) capacity factors were not equally bound to powers of two, such as magnetic disks (sector and track numbers) and networking equipment (bit rates), strict decimal-based units were used. Magnetic storage and magnetic recording are terms from Engineering referring to the storage of Data on a Magnetized medium A computer network is a group of interconnected Computers. Networks may be classified according to a wide variety of characteristics
Some have suggested that the capitalized prefix K be used to distinguish this quantity from the SI prefix k, but this has never been formally mandated. Capital letters or majuscules pronunciation /məˈdʒʌskyuls ˈmædʒəˌskyuls/ in the Roman alphabet A, B, C, D, Further, it is not extensible to higher-order prefixes, as SI already uses the prefixes m and M to mean "milli-" and "mega-" 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. An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol to form a Decimal multiple or
These prefixes are therefore used with either decimal (powers of 1000) or binary (powers of 1024) values, depending on context:
- 1024 bytes (210): This unit is used when expressing quantities which are based on powers of two, such as memory chip capacities. Most software also expresses storage capacity in units of 1024 bytes. Although the use of kilobyte for this unit is common, this usage has been expressly forbidden by the SI standard[1] and other standards organisations. To indicate a quantity of 1024 bytes, the term kibibyte (KiB) has been recommended instead. A kibibyte (a contraction of ki lo bi nary byte) is a unit of Information or Computer storage, established by the International [2][3]
- 1000 bytes (103): This definition is recommended for all uses by international standards organizations such as IEC, IEEE, and ISO,[3] with the abbreviation "kB". The International Electrotechnical Commission ( IEC) is a not-for-profit, non-governmental international Standards organization that prepares and publishes The Institute of Electrical and Electronics Engineers or IEEE (read eye-triple-e) is an international Non-profit, professional organization This unit is common for quantities which are not based on powers of two, such as bitrates. In Telecommunications and Computing, bitrate (sometimes written bit rate, data rate or as a Variable R or f b This term is starting to be adopted by some software, such as the Linux kernel. Linux is an operating system kernel used by a family of Unix-like Operating systems These are popularly termed Linux operating systems and [4]
Kilobyte (abbreviated as kB) is not to be confused with the term kilobit (abbreviated as kb). A kilobit is a unit of information abbreviated kbit (or kb) The standard definition is 1 kilobit = 103 bit = 1000 Bit.
See also
References
- ^ [1] section 3. This is a list of orders of magnitude for Data (or Information) measured in Bits This article assumes a descriptive attitude towards terminology reflecting A megabyte is a unit of Information or Computer storage equal to either 106 (1000000 Bytes or 220 (1048576 bytes depending on 1, marginal note
- ^ Prefixes for Binary Multiples — The NIST Reference on Constants, Units, and Uncertainty
- ^ a b IEEE Std 260. 1-2004, IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units), Revision of IEEE Std 260. 1-1993 (IEEE, New York, 2004)
- ^ Post on Linux Kernel Mailing List announcing the change.
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