iDisapprove

There is a lack of role models because there is a perception among the younger generation of women that programming is not a creative endeavor, which makes a lot of women away from learning programming. The society's portrayal of programmers as geeks or beta males does not help either. People are the sum total of the 5-10 people they closely associate with, and most girls do not find their friends wanting to be programmers when they grow up. Peer support, role models, are key. When women like Sheryl Sandberg of Facebook start showing up on TV and the idea of successful women in technology is portrayed to be appealing, you will slowly find women taking more to technology jobs.

Lack of role models. Thats probably the biggest reason there are not enough women in technology.

Also, your mention of sexist culture makes it sound like that's the culture in technology startups, this is not true. Sexism, where it exists, does not depend on the domain. Its pervasive.

Really? Women do not start or get involved with tech companies because the male programmers make sexist jokes?! Get real. Women are just as competitive as men, and the reason they stay out of tech has not much to do with sexism. I am all for women and men being equal, but putting men on the burning stake for something like this seems unfair to me.