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Twitter, San Francisco

Many tech companies have offices that suggest the architect saw a few too many episodes of “The Jetsons.” The social networking service Twitter, which received a $300 million investment from Prince Walid bin Talal of Saudi Arabia in 2011, has gone 180 degrees by moving into a 1939 art deco building in San Francisco.

"A revitalized building like SF Mart offered Twitter several key advantages,” Ed Axelsen, Twitter’s director of facilities, said in a statement. “It's centrally located for public transportation; the building has lots of light, it has huge floor plates, it offered the possibility of outdoor space; and perhaps most appealing, it's an historic building that is being revitalized for modern use."

Troy Holden | Twitter