M = 1000 in Roman numerals, but the confusing bit is not reading them like Roman numerals (2000) but rather interpreting them as one thousand thousands, or one million.
This came up in a thread a while back (http://news.ycombinator.com/item?id=1483667). Bottom line is that "MM" comes from the banking/finance world. In banking, $3M actually means $3,000 and $3MM means $3,000,000.
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This is offtopic, but what's MM? What's the second M for?
M = 1000 in Roman numerals, but the confusing bit is not reading them like Roman numerals (2000) but rather interpreting them as one thousand thousands, or one million.
Hmm, so who uses this? How is it better than just saying $3M?
MM is the standard abbreviation for million in the financial world. "The great thing about standards is that there are so many to choose from."
This came up in a thread a while back (http://news.ycombinator.com/item?id=1483667). Bottom line is that "MM" comes from the banking/finance world. In banking, $3M actually means $3,000 and $3MM means $3,000,000.
I see, thank you. I prefer the SI, kilodollars, megadollars, etc.