https://qz.com/911737/silicon-valleys-gender-gap-is-the-resu...
More on this, computer were expensive toys, and traditionally boys get more expensive toys than girls. It's quite understandable the marketing decision there.
https://www.theguardian.com/world/2005/dec/06/gender.christm...
https://qz.com/911737/silicon-valleys-gender-gap-is-the-resu...