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The Millennial CAPTCHA
(www.jwz.org)
Post funny things about programming here! (Or just rant about your favourite programming language.)
It's called T9 typing btw. I'm old enough (30) to have had a few phones with buttons myself before the smartphone era gained momentum. I never got really good at it (didn't text much). My older sister by a few years is a racer at T9 typing though. I remember her phone was making clicking noises at insane rates.