This is the remarkable story of the six young women who programmed the world's first all-electronic programmable computer, ENIAC, as part of a secret US WWII project. They changed the world, but were never introduced and never received credit. These pioneers deserve to be known and celebrated: Betty Snyder Holberton, Jean Jennings Barik, Kay McNulty Mauchly Antonelli, Marlyn Wescoff Meltzer, Ruth Lichterman Teitelbaum and Frances Bilas Spence.