Striking graph. Having been there at the time, I'd propose roughly the same explanation she does, though in less loaded terms. The decline starts about 5-6 years after microcomputers became widely available. Assuming 4 years to graduate, that means the decline in women CS majors begins almost exactly at the time kids started to be able to hack in HS.<p>Up till 1980 or so, CS was like other engineering disciplines in that it was something most students started to learn in college. Few students arrive in college already proficient in mechanical engineering. But starting in the early 80s, students started to arrive who were already proficient (or at least, experienced) in programming. These kids were self-selected, and they were almost exclusively boys.