Mega is a unit prefix in the metric system denoting a factor of one million. It was confirmed
for use in the International System of Units in 1960. Mega comes from the Greek μέγας
megas, meaning "great".
Other common examples of usage megapixel - 1 million pixels in a digital
camera one megatonne is the approximate energy released
on igniting one million tonnes of TNT. megahertz — frequency of electromagnetic
radiation for radio and television broadcasting, GSM, etc. 1 MHz = 1,000,000 Hz.
Exponentiation When units occur in exponentiation, such as
in square and cubic forms, any size prefix is considered part of the unit, and thus included
in the exponentiation. 1 Mm2 means one square megametre or the size
of a square of 1000000m by 1000000m or 1012m2, and not 1000000square metres.
1 Mm3 means one cubic megametre or the size of a cube of 1000000m by 1000000m by 1000000m
or 1018 m3, and not 1000000cubic metres Computing
In computing, mega may sometimes denote 1,048,576 of information units, but denotes 1000000
units of other quantities, for example, transfer rates: 1megabit/s = 1000000bit/s. The prefix
mebi has been suggested as a prefix for 220 to avoid ambiguity.
See also Binary prefix
Mebibyte Metric prefix
Order of magnitude References
External links BIPM website