Test your geek credentials with artist Otis Frampton's series ABCDEFGEEK, which features various examples and icons of geek culture.
Everything from Joss Whedon to, obviously, Star Wars is referenced in what Frampton calls his "geek-infused alphabet."
Frampton' illustrated his humorous series and you can check out volume one below. He's also done a volume two and is currently progressing through three, which you can see over on his website.
Oh and if you don't get what 'T" is, then don't you dare call yourself a geek.