exponent	prefix	symbol	looks like...
24	yotta	Y	1,000,000,000,000,000,000,000,000
21	zetta	Z	1,000,000,000,000,000,000,000
18	exa	E	1,000,000,000,000,000,000
15	peta	P	1,000,000,000,000,000
12	tera	T	1,000,000,000,000
9	giga	G	1,000,000,000
6	mega	M	1,000,000
3	kilo	k	1,000
2	hecto	h	100
1	deka	da	10
0			1
-1	deci	d		0.1
-2	centi	c		0.01
-3	milli	m		0.001
-6	micro	µ		0.000001
-9	nano	n		0.000000001
-12	pico	p		0.000000000001
-15	femto	f		0.000000000000001
-18	atto	a		0.000000000000000001
-21	zepto	z		0.000000000000000000001
-24	yocto	y		0.000000000000000000000001

exp	prefix	symbol	meters	seconds	grams
24	yotta	Y
21	zetta	Z	Distance to Andromeda Galaxy: 19Zm
18	exa	E	Diameter of Milky Way Galaxy:900Em
15	peta	P	One LightYear: 9Pm
12	tera	T		Age of Universe: 450Ts
9	giga	G	Distance to Sun: 150Gm	Human Recorded History: 180Gs Century: 3Gs
6	mega	M	Circumference of Earth: 40Mm Distance across continental US: 5Mm LightSpeed: 300Mm/s	Year: 31Ms
3	kilo	k		Day: 86Ks	Average human: 50kg
2	hecto	h		Sunlight to Earth: 5hs
1	deka	da
0
-1	deci	d
-2	centi	c
-3	milli	m		Typical '90s null-RPC: 5ms Light across continental US: 16ms
-6	micro	µ
-9	nano	n	Visible Light: 40-70nm '97 transister width: 250nm
-12	pico	p	Angstrom: 100pm Diameter of Hydrogen atom: 120pm
-15	femto	f
-18	atto	a
-21	zepto	z
-24	yocto	y	Diameter of Proton: 1.7ym