[HPsquared]

To be fair, 'kk' is often used as an abbreviation for million in some countries.

[speerer]

Interesting - I hadn't heard that one.

I hope I wasn't being unfair, and I certainly didn't mean to criticise.

[justsomehnguy]

I sometimes see kk on the interwebs when writing the full numbers doesn't make sense ie too many zeroes or to avoid the accidental confusion between k and M.