1. Luis von Ahn Carnegie Mellon University

2. Verification technology developed in collaboration with Carnegie Mellon University “CAPTCHA”

3. Help! I’ve been waiting for 20 minutes, and nothing happens “ ” Verification technology developed in collaboration with Carnegie Mellon University

5. (From www.slashdot.org) QUICKVOTE Which is the best Computer Science Grad School in the US? CMU MIT vote Berkeley StanfordCornell Washington

6. Verification technology developed in collaboration with Carnegie Mellon University

7. CAPTCHA Sweat Shops Spam companies hire humans to type CAPTCHAs all day long $2.50 per hour for each human 720 captchas per hour per human 1/3 cent per account

8. VOTE FOR LUIS 2012

10. Can we use this human effort for good? Roughly 200 million CAPTCHAs are typed every day 10s of human time per CAPTCHA

11. Digitizing Books Scan OCR DE xi Ii ARIi.. COPBCtrAGE\, DeC. I l 1 QOn. Tlie royal palace at Frieclericheberg took fire last night. The li.ing himself directed the operations fns extinguishing the lire. The whole structure , , ed.

12. Scanned book Word that OCR can’t read Randomly distorted image of word

13. Free

18. Words Digitized Per Day

21. Years 1851-1980 will be completed in 2009 Where do the Words Come From?

22. 400,000,000 (6% of the world’s population)

23. www.recaptcha.net