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It is true that abbreviations of proper names should be caps and others lower
case. (Of course, there are always exceptions, such as element names.)
Excellent illustration is the SI unit for pressure, the Pascal. The
abbreviation is Pa. The Pascal is too small for convienent usage in
meteorology. Therefore the unit hectoPascal (100 Pascals) is commonly used and
is abbreviated hPa.
FWIW, kK is kiloKelvins! (that's a lower case K and an upper case K)
ps: In casual use, I still use upper case K (and M) when refering to memory
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voice 612/757-6916 fax 612/757-4515 email jfwoods -at- maroon -dot- tc -dot- umn -dot- edu