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This timeline of binary prefixes lists events in the history of the evolution, development, and use of units of measure that are germane to the definition of the binary prefixes by the International Electrotechnical Commission (IEC) in 1998, [1] [2] used primarily with units of information such as the bit and the byte.
IEC 60137 Insulated bushings for alternating voltages above 1000 V; IEC 60139 Preparation of outline drawings for cathode-ray tubes, their components, connections and gauges; IEC 60141 Tests on oil-filled and gas-pressure cables and their accessories; IEC 60143 Series capacitors for power systems
In this era, bit groupings in the instruction stream were often referred to as syllables [a] or slab, before the term byte became common. The modern de facto standard of eight bits, as documented in ISO/IEC 2382-1:1993, is a convenient power of two permitting the binary-encoded values 0 through 255 for one byte, as 2 to the power of 8 is 256. [8]
The harmonized ISO/IEC IEC 80000-13:2008 standard supersedes subclauses 3.8 and 3.9 of IEC 60027-2:2005. The only significant change is the addition of explicit definitions for some quantities. The only significant change is the addition of explicit definitions for some quantities.
"Note that the IEC names are defined only up to exbi-, corresponding to the SI prefix exa-. The two SI prefixes zetta- (10 21) and yotta- (10 24) have no corresponding IEC binary prefixes, though the obvious continuation would be zebi- (Zi = 2 70 = 1000 7 × 1.180 591 620 717 411 303 424) and yobi- (Yi = 2 80 = 1000 8 × 1.208 925 819 614 629 ...
A binary prefix is a unit prefix that indicates a multiple of a unit of measurement by an integer power of two.The most commonly used binary prefixes are kibi (symbol Ki, meaning 2 10 = 1024), mebi (Mi, 2 20 = 1 048 576), and gibi (Gi, 2 30 = 1 073 741 824).
In 1998 the International Electrotechnical Commission (IEC) published standards for binary prefixes, requiring that the gigabyte strictly denote 1000 3 bytes and gibibyte denote 1024 3 bytes. By the end of 2007, the IEC Standard had been adopted by the IEEE, EU, and NIST, and in 2009 it was incorporated in the International System of Quantities ...
The unit prefix for the provided value. One of SI or IEC prefixes. 3: The unit prefix to convert into. 4: Significant digits after decimal dot or, if negative, exponent of ten. d: Decimal mode. If set, prefixes will based on powers of 10 instead of 2. Automatically set if IEC prefix is used. link: Add link to provided unit. fmt: fmt parameter ...