[marclove]

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.

[StavrosK]

I see, thank you. I prefer the SI, kilodollars, megadollars, etc.