My personalized Perl bumper sticker
Yep - See it in all it's glory:
Actually, up close, with the sun reflecting on all the little rainbow coloured dot means this pix doesn't do it justice.
And yes, I should have caps on the 'open source' part...
Sigh... Next time. These last about a year exposed to the weather.
PS: Luckily for me a Toyota Prius has an almost-vertical window at the back.