For many women — myself included — International Women's Day is a day of mixed feelings. It’s a day to celebrate the strides women have made in the past and present, encourage each other to keep fighting the good fight, and inspire future generations of young women and girls. But at the same time, we face the fact that true gender equality is still a long ways off. IWD, therefore, isn't just a day to toast women's progress. It's a day to actively pursue the collective goal of closing gender gaps in all forms. There are plenty of reasons why the lack of gender representation in the tech sector is still particularly notable. Judith Spitz, Founding Director of the WiTNY Initiative, highlighted several of these reasons in her speech at the 2016 Propeller Innovation, and while they all remain relevant today, I want to highlight three that hit close.