UNIT	ABBREVIATION	FACTOR
atto	a	10 -18
femto	f	10 -15
pico	p	10 -12
nano	n	10 -9
micro	u	10 -6
milli	m	10 -3
centi	c	10 -2
deci	d	10 -1
deca	da	10 1
hecto	h	10 2
kilo	k	10 3
mega	M	10 6
giga	G	10 9
tera	T	10 12