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On SI unit abbreviations

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Ok, call me anal, but this bugs me a lot, especially since I have to review and write for scientific journals and incorrect unit abbreviations are required to be fixed before publication. So ... the abbreviation for the prefix kilo- meaning 1000 is 'k', the abbreviation for the unit of power, a watt, is 'W', and the abbreviation for an hour is 'h'
Therefore the proper abbreviation for a kilowatt-hour is 'kWh'. That's all thanks.
http://physics.nist.gov/cuu/Units/units.html
http://en.wikipedia.org/wiki/Kilowatt_hour