On 06/16/2012 03:21 PM, andy pugh wrote: > On 16 June 2012 21:25, Peter Blodow<p.blo...@dreki.de> wrote: > >>> Except that hecto and centi are _not_ prefixes in the SI system. >> Yes they are. Hekto-, deka-, deci- and centi- (100, 10, 1/10, 1/100 >> rsp.) are the only ones with the decimal exponents not being multiples >> of three, > Wikipedia seems to agree. I was certainly taught that it was improper > to use those prefixes though. > Usage really depends on the field. I routinely used Kg, g., mg, ug. for weight and L, mL, uL for volumes. However, take a look at your latest blood chemistry. Units like mg/dL, U/L (units/liter), mmol/L., are routinely used: and then it gets worse K/uL (white blood cells), M/uL (red blood cells), fL (mean cell volume), pg ( no volume given), % (hematocrit), Change those units and you will confuse every medical doctor out there...not something you want to do.
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