It measures the Twitter Equality Quotient or Twee-Q of any account by riffling through its re-tweets to calculate the gender split.

BBC: Webscape: Celebrating 40th anniversary of Apollo 11

Visa can do it 4, 000 times a second and did it 35 billion times last year, riffling through more transactions in an hour than all of the world's stock exchanges do in a day.

FORBES: Visa's vision