Ok I will assume you all know how to get to the laptop on blackops but just in case.

On the start screen you're strapped into a chair hit the left an right triggers alternatly an you'll break out the straps and stand up. Walk round behind the chair you will see a laptop

Hit "X" to use the laptop and type in these codes.

Type in Zork to launch Zork
Type in DOA to unlock Dead Ops Arcade
Type in 3ARC UNLOCK to unlock all three zombie mode maps.
Type in 3ARCH INTEL to unlock all of the intel, but miss out on an achievement
Type in alicia for your own personal therapist

you can also type in "mail" to view the email and "who" to view all the users on the laptop

Hope this is usefull to someone.