I like, if not love, reCAPTCHAs, since it prevents spam in a simple, albeit elegant, way. Provided that the phrase is easily readable and could be easily inputted by humans, it could be a fun experience, knowing that you are helping to encode books currently sponsored by the reCAPTCHA project.

But how do you input this? (This came from Facebook.)

Fb reCaptcha

I have no problem with mettexch, but how about A(a)^T? Even Unicode has (currently) no superscript version of T, uppercase or lowercase.

It also looks like it has been LaTeXed. I really love LaTeX.

Related articles

• reCAPTCHAs make sense (dogsmeat.wordpress.com)
• reCAPTCHA: Awesome Use of Wasted Time That Works (blogs.sitepoint.com)

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