MM can also have other meanings and uses outside of the above-given contexts. For example, it is an abbreviation or acronym for various phrases, such as “military medical,”“multimedia,” and “molecular mass.” Some of its other meanings are useful in scientific notation and measurements: ...
that we abbreviate thousands in our analysis with the letter M. If we wanted to denote millions, we would show that as MM. For this, we should credit the Romans. M is the Roman numeral for thousand and MM is meant to convey one thousand-thousand — or million. To take i...
The abbreviation of Million Btu (M Btu or m Btu) is easily confused with the SI mega- (M) prefix which denotes multiplication by a factor of one million (×106), or with the SI milli- (m) prefix, which denotes division by a factor of one thousand (×10−3). Therefore, in ...