One thing I noticed recently when looking through some reports is that thousands are often abbreviated, in a similar way to scientific measurements are abbreviated.
E.g. $1,000,000 becomes $1m and £20,000 becomes £20K
I was curious about the capitalisation choices though, and the fact that they appear to be the opposite of what SI would specify for kilo- (k) and mega- (M).
Does anyone know where these monetary abbreviations came from and why they're capitalised in this way?