Only about a quarter of computer professionals are women--and that's actually down from 1990 when it was 36%. Girls Who Code is a non-profit organization whose mission is to change all that by closing the gender gap in computer science. Founded in 2012 by Reshma Saujani, the program is on track to educate more than 40,000 girls in all 50 states this year. Her goal: one million women in computer science by 2020. And we'll need them. In less than 10 years, the United States will have 1.7 million jobs for engineers and computing professionals. Without girls, we will literally not have enough qualified people to fill these jobs.