NASA Office of Logic Design

NASA Office of Logic Design

A scientific study of the problems of digital engineering for space flight systems,
with a view to their practical solution.

Prefixes for binary multiples

In December 1998 the International Electrotechnical Commission (IEC), the leading international organization for worldwide standardization in electrotechnology, approved as an IEC International Standard names and symbols for prefixes for binary multiples for use in the fields of data processing and data transmission. The prefixes are as follows:

 Factor  Name  Symbol  Origin Derivation 
 210 kibi Ki kilobinary: (210)1 kilo: (103)1
 220 mebi Mi megabinary: (210)2  mega: (103)2
 230 gibi Gi gigabinary: (210)3 giga: (103)3
 240 tebi Ti terabinary: (210)4 tera: (103)4
 250 pebi Pi petabinary: (210)5 peta: (103)5
 260 exbi Ei exabinary: (210)6 exa: (103)6

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Last Revised: March 13, 2003
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