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Today in History: IBM unveils first program-controlled calculator at Harvard

8/7/2025

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Summary

Story summary

On August 7, 1944, IBM introduced the Harvard Mark I, also known as the Automatic Sequence Controlled Calculator, to Harvard University. This groundbreaking electromechanical computer played a crucial role in the war effort during World War II, marking a significant advancement in computing technology. The Mark I set the stage for future developments in computer science.

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Story summary

On August 7, 1944, IBM introduced the Harvard Mark I, also known as the Automatic Sequence Controlled Calculator, to Harvard University. This groundbreaking electromechanical computer played a crucial role in the war effort during World War II, marking a significant advancement in computing technology. The Mark I set the stage for future developments in computer science.