During the early 1940's, Kay McNulty, a recent math graduate from Chestnut Hill College, was employed along with about 75 other young female mathematicians as a "computer" by the University of Pennsylvania's Moore School of Engineering. These "computers" were responsible for making calculations for tables of firing and bombing trajectories, as part of the war effort. The need to perform the calculations more quickly prompted the development of the ENIAC, the world's first electronic digital computer, in 1946.
Kay McNulty Mauchly Antonelli recalls computing in 1946:
"We did have desk calculators at that time, mechanical and driven with electric motors, that could do simple arithmetic. You'd do a multiplication and when the answer appeared, you had to write it down to reenter it into the machine to do the next calculation. We were preparing a firing table for each gun, with maybe 1,800 simple trajectories. To hand-compute just one of these trajectories took 30 or 40 hours of sitting at a desk with paper and a calculator. As you can imagine, they were soon running out of young women to do the calculations. Actually, my title working for the ballistics project was `computer.' The idea was that I not only did arithmetic but also made the decision on what to do next. ENIAC made me, one of the first `computers,' obsolete.