What is type of os used in TV series

what is type of operating system used in some TV series like 24,alias?
i am sure it is not windows neither xp nor 7
my be linux or mac

best regards
2 answers Last reply
More about what type series
  1. Many TV advanced looking computer systems are merely mock ups done on Windows, OS X, and Linux systems. Really nothing special.

    What are you really trying to do here?
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