Prefixes for binary multiples

In December 1998 the International Electrotechnical Commission produced new prefixes for binary multiples, in order to bring such prefixes as kilo- and mega- back under their SI definitions as multiples of 10. It is part of the standard IEC 60027-2, Second edition, 2000-11, Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics.

These definitions are:

Factor	Prefix	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

However, as of 2004, these prefixes have not been widely adopted by the online community.