It is hard for many of us to imagine a time without calculators and computers to do the tedious task of sorting at mass amounts of data. Before computers, actual people had to do this. Data would be collected by men opperating telescopes, then it needed to be processed. Edward Pickering amassed a group of women (hired not only for their ability but mostly because hiring women was much cheaper than hiring men) to sort through this all of this data. The women were tasked with cataloguing the colour and how bright stars were, and also dictating their positions in the sky. Most noteable of these women was Annie Jump Cannon who pioneered a system of spectral classification.

Works cited: https://www.britannica.com/biography/Annie-Jump-Cannon
https://www.womenshistory.org/education-resources/biographies/annie-jump...
https://www.sdsc.edu/ScienceWomen/cannon.html