In 1970's the number of women was low(10-15%) in every field, be in law, medicine, computer science and physical sciences. The numbers have been increasing steadily till date except for computer science, till 85 it was was something around 30% and then it started decreasing. Now computer science has less than 20% women and whereas other field have achieved near perfect gender equality in terms of percentage of women enrolled. What went wrong? According to the author, 80s saw a release of series of SciFi movies with a geeky male protaganist. At that time computers were only toys and they bought only for boys. We got our norm, men are geeky women are not and there by we got the diversity problem in tech.