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Mega Bloks
mega- (symbol M) is an SI prefix in the SI system of units denoting a factor of 106, 1,000,000 (one million). more...
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For example, 1 MW (megawatt) = 1,000,000 watts = 1,000 kilowatts.
Confirmed in 1960, it comes from the Greek μέγας, meaning great. It is cognate with the Sanskrit word maha, meaning "great".
Other common examples of usage
one megaton (a unit often used in measuring the explosive power of nuclear weapons) is 1,000,000 tTNT.;
megahertz — frequency of electromagnetic radiation for radio and television broadcasting, GSM, etc. 1 MHz = 1,000,000 Hz;
Computing
In computing, mega- can sometimes denote 1,048,576 (220) of information units (example: a megabyte, a megaword), but can denote 1,000,000 (106) of other quantities, for example, transfer rates: 1 megabit/s = 1,000,000 bit/s.
The prefix mebi- has been suggested as an alternative for 220 to avoid ambiguity, but is yet to be widely used.
Read more at Wikipedia.org
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