I looked at several articles on the subject, and couldn’t find statistics on the percentages of women in computer science. The Wikipedia article is poorly sourced and lists only 3 women before 1940. After that, women were recruited to perform calculations since so many men were engaged on the front lines of the war effort, and women were of course just as good at math as men. If you can find some sort of percentage, that would be helpful. But even if women were more prevalent in the early years of computing, it wouldn’t be all that surprising since cultural preferences and technologies shift. I just know that right now computing is a mysteriously male dominated field, even as mathematics has achieved gender parity, and I suspect that it could have something to do with a strong cultural preference of men to be very system oriented, rather than people oriented. If you learn a foreign language, you can talk with many more people. Learn a computer language, and you’ll be able to talk with a lot more non-person systems. Of course, the rise of AI may change all of this 😉