When the United States Navy’s Naval Aircraft Factory in Philadelphia needed to ramp up their labor force in early 1918, it began to train and employ women. According to William F. Trimble, author of Wings for the Navy: A History of the Naval Aircraft Factory, 1917-1956, the factory’s first female factory worker was Marion Elderton, already on staff as a secretary. That transition happened in December of 1917, and by June of 1918, the labor force included 218 women. One year later (Dec.1918), NAF female employment reached 890, which was 24.5% of the work force.
Yes-they were referred to as girls
Not to put too fine a point on it, I suspect that the writer of the captions on these photographs was male, perhaps referencing the novelty of the subject. Trimble’s use of female and women is fitting for 1990, the time of his publication. Not so in 1918, when women were still fighting for the right to vote.