Quote:
Originally Posted by stevehull
kilo (thousand) is a lower case k, mega (million) is an upper case M (don't know why)
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Mega is upper case to differentiate it from milli (thousandth or .001). Anything Mega and up is capitalized as Peta (P), Zetta (Z), and Yotta (Y), also share lower case abbreviations with Pico (p), Zepto (z) and Yocto (y).