I worked at an investment bank in the 1990s. Their programming staff (and IT staff in general) was roughly half female. I think it's more common in companies wh

I worked at an investment bank in the 1990s. Their programming staff (and IT staff in general) was roughly half female. I think it's more common in companies where IT is a supporting function and not the core business. By contrast, the tech companies I've worked at have all been almost entirely male.