This graph makes me very sad. Well, not the graph really, the actuality behind it.
I mean, I have seen graphs of the inequality trends before, many times, but this presentation really does show quite starkly that gender equality in computer science were going along making notably good progress, and then in 1984 Something Went Horribly Wrong. And then 20 years later something else went Even More Horribly Wrong, though the article doesn't discuss that one.
And one of the sad things about it: What happened in 1984? What happened in 1984 was this: 1984 Apple's Macintosh Commercial (HD)
. Personal computers happened with all sorts of great promise for creativity, and should have revolutionized the world of computer science for a whole generation of kids who would now grow up with computers around. But, somehow, this only revolutionized it for boys; girls got left behind.
It's all contemporary with the slide away from commercial toy marketing looking (sometimes, anyway) like http://www.whatitisisbeautiful.com/1981-lego-ad/
, which probably also tells us something.