The National Archives recently digitized the Card File of Population Data Relating to the 17th Census, 1950 (National Archives Identifier 2990400). While this card set is mundane and may not be extraordinarily useful, it serves as a good reminder that BCE – “before the computer era” – people, businesses, and government alike used “card files” as a data management tools for quick storage and retrieval of important, useful, or frequently accessed information as discussed in my recent blog post, Census Fun Fact #5 – The Geography Division’s Quick Reference Card File of 1950 Census Population Data. Check it out.
P.S.: The 1950 population census will become available to researchers on April 1, 2022.