Whether it's a work of graphical beauty or just a quick scrawl, graffiti is made all the better when it's got a touch of the geek. Below you'll find 33 fine examples ranging from some nice clear stencilling to some fairly obscure coding references...

At 11:31:30pm tonight champagne corks will be popping as the ten-digit clock used by Unix computers will display all ten decimal digits in sequence.

The 1234567890 milestone is due to be celebrated by Unix-lovers around the world with parties...