If you're a real geek, you'll get the meaning of this apparently nonsensical statement. This is our top-selling geek design, and is prominently featured in the Technology in Action Complete textbook: There are 10 kinds of people. Those who understand binary and those who don't.
Keywords/tags: Geeks, nerds, math, math geek, computer geek, binary, binary humor, humorous geek slogans, funny geek slogans, humorous math slogans, humorous binary slogans, binary t-shirts, binary merchandise, 10 kinds of people, binary mugs, binary bumper stickers