reCAPTCHA is a site that turns old books, Newspapers and old time radio shows and digitizes them. CAPTCHA is a program to tell wether its human or computer. It is used to prevent bots spamming or automated programs usually written to make spam. There is no computer that can read distorted text, so if sites are protected by CAPTCHA then bots cant spam. Around about 200 million CAPTCHAS are being figured out by humans a day.
I have used these many times and get really annoyed by them but now I know that it helps turn olds books newspapers and old time radio shows it doesnt really annoy me.
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