I got to meet Grace Hopper many years ago. She gave me a nanosecond after her talk. This was in the 1980s, probably while she was working for DEC. It made quite an impression on me, and it's now framed on the wall. I wish I'd gotten her autograph!
She was one of the original hackers. I don't think that she was a woman was ever relevant to her, and by the force of her personality, and her efforts, she made it irrelevant to everyone else. For instance, I keep forgetting it. Not that she was female, but that it was unusual that she was female. EG: she wasn't a "Pioneer of Female Programmers", she was instead simply a "Computer Pioneer".
I don't know the specific barriers she had to overcome, but I know they must have been significant-- for much of her career, people didn't really understand what computers even were. Even as late as the 1980s, talking heads on TV would often say things that implied they thought computers were intelligent, or other equally silly perspectives... because they were so new they had never been exposed to society at large. Now take that lack of understanding in the population in general and project it onto the navy which, as a military, is generally lower tech and more conservative? Of course she was in the research area, but there were certainly huge amounts of misunderstandings she had to deal with in people who simply had never been educated about computers. So she gave these talks that continued after she left the Navy and started working for DEC. She made it her mission to teach people about this new technology. I can't imagine her refusing to speak at a conference simply because there are more men than women-- I imagine most of the conferences she went to, she was the only female speaker.
PS- I think her handing out the nanoseconds was brilliant, as a teaching aid. She took an abstract concept and made it physical. How rare is that these days? Plus if you can give someone something they're much more likely to remember what you're trying to teach them. Even if it is a bit of old telephone wire... that mundane piece of plastic and copper became imbued with the story she told.
Quite and impression!