The computer field—and especially free and open source software—has to work harder to be friendly to women and non-binary participants. We could do well to look at a little-known group called GNU Girls that helped to change the field between 2001 and 2008. Women's actual participation in computing has varied a lot over time and varies between regions. One source of research finds that only 18% of computer professionals are currently women, while another is more optimistic at 30%.