I have seen some interesting captchas over the years, and some of them intrigue me enough to find out why they are what they are - the history - the mythical meanings - all very interesting to me.

If you want to see all my other captcha research check out my master index http://bitbin.it/fbhOXm1W/

Here is another captcha word combo: the matrix

Commercial & Industrial Business:
http://www.matrix.com/
http://www.matrixservice.com/
http://www.toyota.com/matrix/

Definition, Dictionary, and Pedia sites:
https://en.wikipedia.org/wiki/The_Matrix
http://matrix.wikia.com/wiki/The_Matrix
http://www.merriam-webster.com/dictionary/matrix
https://en.wikipedia.org/wiki/Matrix_(mathematics)
http://www.dictionary.com/browse/matrix
http://www.thefreedictionary.com/matrix
http://medical-dictionary.thefreedictionary.com/matrix

Education, Training:
http://mathworld.wolfram.com/Matrix.html

Entertainment, Movies, and Music:
http://www.imdb.com/title/tt0133093/
http://www.warnerbros.com/matrix
http://www.thematrix101.com/
https://www.youtube.com/watch?v=vKQi3bBA1y8

Health & Fitness:
http://www.matrixfitness.com/en/

Shopping and Stores:
https://www.amazon.com/Matrix-Keanu-Reeves/dp/B00000K19E

Social Media, Facebook, GooglePlus, Twitter:
https://plus.google.com/+RichardMolby_KE5GRW/posts/K7b2neVihN1

Web Development:
https://matrix.org/

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http://bitbin.it/fbhOXm1W/ Interesting Captchas master index - links to all my captcha pastes
http://bitbin.it/S4WFaJLS/ BitBin Throwback Index - interesting pastes I found here