| http://www.w3.org/ns/prov#value | - sers.I am talking about CAPTCHA, the illegible string of letters and numbers that web users have to enter into online forms to prove they are human, before they are allowed to transact on e-commerce sites, post on message boards, sign up to online services and conduct many other online activities.CAPTCHA is used by web companies big and small including Google and Skype, as well as government repre
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