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Carnegie Mellon University Libraries
library.cmu.edu
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ON THIS DAY in 2009, Google acquired reCAPTCHA!
Ever wonder why you prove you're human online? @cmu.edu Prof Manuel Blum & grad student Luis von Ahn (SCS 2005) created CAPTCHA—those squiggly letters distinguishing humans from bots. 🤖👩💻
Celebrate 125 years of CMU history here: cmu.is/room-to-imagine
2025-09-16T14:42:10.110Z