Its called CAPTCHA which is "Completely Automated Public Turning test to tell Computers and Humans Apart".
www.captcha.net http://www.google.com/search?hl=en&q=captcha&btnG=Google+Search
Thanks Animesh - just made my day. :)
By the way, I tend to see a lot less of the folks below - where are you all ?
[1] Indranil Das Gupta [2] Tathagata Banerjee [3] Sudhir Banerjee [4] P K Sharma [5] R Kankaria [6] Sayan Chakraborty
The list is just an off hand one, so don't go around discerning ranks.
Regards Sankarshan
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