Nothing says "I'm a real geek" like inside jokes written in 0-and-1 computer processing binary code. The To weed out the non-geek house guests, adorn your place with these accessories and see who gets the joke.

• The Welcome In Binary Floor/Door Mat looks like a cool retro patterned door mat. But those in-the-know "will see that pattern as a collection of seven other patterns at which point he'll quickly decode the message, chuckle, and slap the knocker on your door." $39.99 at Think Geek.
• The cleverly named /dev/blanket and /dev/pillow are covered in ones and zeros that spell out—you guessed it—"blanket" and "pillow." $39.99 and $14.99 from ThinkGeek.
• Who needs a movie poster? The You Had Me From Hello Binary Mousepad is a step up on the ladder of geekdom. $13.15 from Zazzle.
• And for the office, grab this seemingly simple binary mouse pad. Broken up into ones and zeros, it reads "I'm Smarter than my Boss." Brilliant! $14.95 from Zazzle.

(Couch image: Flickr user back_garage under license from Creative Commons.)