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In 1946, one of the world\u2019s first electronic computers was unveiled in Philadelphia, in the USA.

It was called the Electronic Numerical Integrator and Computer, or ENIAC, and was initially designed to do calculations for ballistics trajectories.

It was programmed by six female mathematicians.

Rachel Naylor speaks to Gini Mauchly Calcerano, whose dad John Mauchly co-designed it, and whose mum, Kay McNulty, was one of the programmers.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there. For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

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(Photo: Computer operators programming the ENIAC. Credit: Corbis via Getty Images)