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Dorothy Vaughan teaches herself the programming language Fortran to enable her to operate the IBM 7090 computer, something her male colleagues fail to do.
The study was made in the course of developing an automatic lens-design program for use on the IBM 7090 computer at United Aircraft Research Laboratories.
In 1960, the cost to lease an IBM 7090 mainframe, with transistors instead of vacuum tubes in its memory and logic circuits, was about $20,000 per month.