General

Data Sizes SI vs IEC

To define data sizes there are two existing systems. On one hand there is the SI Metric system based on the decimal numbers ${10}^n$. On the other hand there is the IEC system based on the binary numbers $2^n$

${10}^n$	Decimal	Prefix	Symbol
${10}^{24}$	1 000 000 000 000 000 000 000 000	yotta	Y
${10}^{21}$	1 000 000 000 000 000 000 000	zetta	Z
${10}^{18}$	1 000 000 000 000 000 000	exa	E
${10}^{15}$	1 000 000 000 000 000	peta	P
${10}^{12}$	1 000 000 000 000	tera	T
${10}^9$	1 000 000 000	giga	G
${10}^6$	1 000 000	mega	M
${10}^3$	1 000	kilo	k
${10}^2$	100	hecto	h
${10}^1$	10	deca	da
${10}^0$	1
${10}^{-1}$	0.1	deci	d
${10}^{-2}$	0.01	centi	c
${10}^{-3}$	0.001	mili	m
${10}^{-6}$	0.000 001	micro	$\mu$
${10}^{-9}$	0.000 000 001	nano	n
${10}^{-12}$	0.000 000 000 001	pico	p
${10}^{-15}$	0.000 000 000 000 001	femto	f
${10}^{-18}$	0.000 000 000 000 000 001	atto	a
${10}^{-21}$	0.000 000 000 000 000 000 001	zepto	z
${10}^{-24}$	0.000 000 000 000 000 000 000 001	yocto	y

The problem with the SI system for defining datasizes is that the data size base unit is $2^n$

Datasizes

1 bytes = 8 bit

IEC

$2^n$	Value	IEC Prefix	IEC Symbol
$2^{10}$	1024	kibibyte	KiB
$2^{20}$	1048576	mebibytes	MiB
$2^{30}$	1073741824	gibibyte	GiB
$2^{40}$	1099511627776	tebibyte	TiB
$2^{50}$	1125899906842624	pebibyte	PiB
$2^{60}$	1152921504606846976	exbibyte	EiB
$2^{70}$	1180591620717411303424	zebibyte	ZiB
$2^{80}$	1208925819614629174706176	yobibyte	YiB

SI

${10}^n$	Value	SI Prefix	SI Symbol
${10}^3$	1 000	kilobyte	kB
${10}^6$	1 000 000	megabyte	MB
${10}^9$	1 000 000 000	gigabyte	GB
${10}^{12}$	1 000 000 000 000	terabyte	TB
${10}^{15}$	1 000 000 000 000 000	petabyte	PB
${10}^{18}$	1 000 000 000 000 000 000	exabyte	EB
${10}^{21}$	1 000 000 000 000 000 000 000	zettabyte	ZB
${10}^{24}$	1 000 000 000 000 000 000 000 000	yottabyte	YB