Women are underrepresented in the field of computer science in the U.S., and their numbers are declining. A study by the National Science Foundation found the percentage of females among computer science majors in 2014 was 18, down from 35 percent in 1985. The underrepresentation begins in high school — girls are much less likely than boys to take an advanced-placement computer science test — and even middle school, when many girls lose interest in science in general and decide not to enroll in high school computer courses.