Women in tech
As ridiculous as I find it, I do sometimes hear that male techies don't take their female colleagues seriously and that some customers don't take she-techies seriously either. But the professor who taught my very first college CS course after I was admitted to the major (in 1984) was a woman, there were women in every single CS class I took, the manager who hired me for my very first real programming job was a woman, one the programmers in the group I worked in with that employer was female, and my younger sister has been working in the field since shortly after she got her mathematics degree in the late 1990s.
One of the obligations associated with being a professional is acting like a lady or gentleman on the job and treating colleagues and clients accordingly. This involves treating people with respect, even if you personally don't think they should be there. And those who doubt the aptitude of most women for the technical professions should remember that even if they're right, that some women do have the aptitude, as has been demonstrated repeatedly over many decades. The numbers of men and women in the technical professions may never be equal (psychological differences between male and female are very real and among the most profound of all differences existing between human beings), but common courtesy and insisting on looking at people as individuals instead of as members of groups would go a long way toward alleviating the discomfort many women feel in working in an overwhelmingly male profession, thus helping to reduce the imbalance.
And as seems necessary, managers may want to follow the example of Bill Veeck, who in 1947, as owner of the Cleveland Indians, hired Larry Doby as the first black player in the American League, had his manager personally introduce him to his teammates and "got rid" of the three who refused to shake his hand (https://en.wikipedia.org/wiki/Bill_Veeck#Cleveland_Indians).