Computers are becoming ubiquitous in our society and they offer superb opportunities for people in jobs and everyday life. But there is a noticeable sex difference in use of computers among children. This article asks why computers are more attractive to boys than to girls and offers a cultural framework for explaining the apparent sex differences. Although the data are fragmentary, the world of computing seems to be more consistent with male adolescent culture than with feminine values and goals. Furthermore, both arcade and educational software is designed with boys in mind. These observations lead us to speculate that computing is neither inherently difficult nor uninteresting to girls, but rather that computer games and other software might have to be designed differently for girls. Programs to help teachers instill computer efficacy in all children also need to be developed.