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Hardly. I was an M&A banker for a decade in New York and we used `M` for millions across the board. A few people would use `MM` but on every deck I signed off we used `M` for millions, `B` for billions

Some people do use `MM` but it's far from a standard.

Mostly Europeans.

I think being programmers we'd expect K and M. Save the mm for your financial report.

Humanity has moved on from roman numerals 1000+ years ago. Talk about tech debt.

> In accounting

Only in America.

america is not the entire world

also a simple google search disproves what you are saying. M is correct

America largely uses K,M,B

Either OP is incorrect, or not American