Neal Stephenson's Cryptonomicon frequently references "Finix" ("Finux"? something like that), an obvious stand-in for Linux. IIRC, Stephenson chose the pseudonym to avoid geek rage if he mis-reported some tiny detail of Linux.
I vaguely remember that. I also remember one of the characters recoding his camera on the fly to take pictures of people ogling his computer at a meeting. Not too realistic, but cool.