This article includes a pretty awesome interactive graph that displays the national average diversity distribution in tech overall (of both gender and race) and within major tech companies as well.
pretty fun to mess around with and see the disproportionate distribution within most major tech companies!!
http://www.theverge.com/2015/8/20/9179853/tech-diversity-scorecard-apple-google-microsoft-facebook-intel-twitter-amazon
*twitter actually has zero percent black females!*
