In the US, only 18% of people graduating with a Computer Science Bachelor are female. Moreover, women who continue to pursue Computer Science leave the profession because for many women engineering students, their first encounter with collaboration is to be treated in gender stereotypical ways, mostly by their peers.
Women account for only 30.9% of Google's Global Workforce. Moreover, Google was forced to hand over it's statistics in 2017 which state that female British employees are payed on average 17 percent less than men, and American women who work full time are on average payed 20 percent less than men.
Only 20% of Computer Science professionals are Women. This means that for every female Computer Science professional, there are 4 male Computer Science professionals.
For every 1$ a Male in CS makes, Women in CS earn 91ยข.

(That doesnt seem like a lot, but starting wage for Computer Scientist is around 70K a year, and that's a difference of 6.3K a year!)

That's 6 Macbook Airs!!

In some cases to avoid this, major companies, such as Google, have avoided this by bringing down the salaries of men to avoid class-action lawsuits.

One reason Women are underrepresented in Computer Science is because they are not presented the opportunity at a younger age. Only 45% of American High Schools offer Computer Science programs.