This it the door to my computer room at home...
Although my computer room isn't Aperture themed like my office at work (My Active Directory domain name is BLACK_MESA, and my servers are named BLACKMESA1, BLACKMESA2, BLACKMESANVR & Barney) I thought this would be cool to see before entering the computer room. PLUS, I have Chell on the other side! XD
EDIT 3/4/12: Updated to better picture
EDIT 3/9/12: Created my own vector image which is an EXACT replica of the in-game sign, without the "weathering" seen in-game. I'm going to start printing out some for my Etsy & eBay stores: [link]