2014
DOI: 10.1007/978-3-319-08213-4_10
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The First Rung of the Cosmic Ladder

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“…Herman Hollerith, its inventor, founded the Tabulating Machine Company that later became IBM (Campbell-Kelly 2018). At the same time, Henrietta Swan Leavitt joined one of the first 'computers' at Harvard, groups of human calculators usually composed by women, since at that time women were not allowed to operate telescopes or other machines (Vishveshwara 2015). She did calculations on measuring and cataloging the brightness of stars, discovering the Cepheid variables, a type of star, that led to the evidence for the expansion of the universe (Johnson 2005).…”
Section: The Early Computer Machines (Before 1900)mentioning
confidence: 99%
“…Herman Hollerith, its inventor, founded the Tabulating Machine Company that later became IBM (Campbell-Kelly 2018). At the same time, Henrietta Swan Leavitt joined one of the first 'computers' at Harvard, groups of human calculators usually composed by women, since at that time women were not allowed to operate telescopes or other machines (Vishveshwara 2015). She did calculations on measuring and cataloging the brightness of stars, discovering the Cepheid variables, a type of star, that led to the evidence for the expansion of the universe (Johnson 2005).…”
Section: The Early Computer Machines (Before 1900)mentioning
confidence: 99%