Tattoos for the Tech Crowd

What kind of tattoos do techies get? Or as Wired.com calls them, geek tattoos. The site offers up nine examples submitted by its readers. Ctrl-Alt-Del and the audio-out icon (below) are most relevant for IT folks. My gut tells me that the techies serving in the military might be sporting some interesting digital-themed tattoos. What tattoos do federal IT workers have?