What is it Called?

A week or too back somebody here posted a link to wikipedia regarding the

"Are You Human" submit form

where characters are distorted within an image, which one has to enter into
the form to be able to validate the form submit.

I Want to know the name of this type of thing !! My memory is failing

Thanks
MS

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1 20th November 18:43 ms External User Posts: 1	What is it Called? SPONSORED LINKS BY GOOGLE A week or too back somebody here posted a link to wikipedia regarding the "Are You Human" submit form where characters are distorted within an image, which one has to enter into the form to be able to validate the form submit. I Want to know the name of this type of thing !! My memory is failing Thanks MS