Venturing beyond assistive technology terminology into correct usage won't please the moderators, but you make a good point. I have a feeling that when thinking about the words underlying the acronym, most people overlook Turing's name. If only that genius behind World War II's Enigma decoding success and later victim of terrible persecution by his own British government could know that half a century after his death, his name would be associated with yet another great invention.
----- Original Message ----- From: "Dave Carlson" <dgcarlson@xxxxxxxxxxxxx> To: <jfw@xxxxxxxxxxxxx> Sent: Monday, March 29, 2010 2:29 PM Subject: Re: CAPTCHA Adrian,Interesting. I wondered where it came from. However according to the acronym given:
"Completely Automated Public Turing Test to tell Computers and Humans Apart."
...the spelling should actually be C A P T T C H A -- two T's. Perhaps the formal definition should not be capitalizing the word "Test"? Dave . ----- Original Message ----- From: "Adrian Spratt" <Adrian@xxxxxxxxxxxxxxxx> To: <jfw@xxxxxxxxxxxxx> Sent: Monday, March 29, 2010 11:19 Subject: CAPTCHARecently, there was a brief exchange on this list about the term and spelling of "CAPTCHA." I'm currently reviewing proposed accessibility regulations by the federal government. I'm not sure that this complex organization should be deemed the arbiter of correct usage, but I do think they try to get it right. So below is the spelling they use and the definition they propose for purposes of the regulation.
CAPTCHA. "Completely Automated Public Turing Test to tell Computers and Humans Apart." A Turing test is any system of tests designed to differentiate a human from a computer. CAPTCHA tests often involve asking the user to type in text that is presented in an obscured image or audio file.
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