[silvertab]

Just a few examples of what (I'm guessing) he was referring to:

The dock (Gnome left, OS X Right:) http://d.pr/pUgC

Launchbar / Application Launcher http://d.pr/1cGv

Exposé / Window Selector: http://d.pr/5Vr9

[papercrane]

Neither the dock or launch bar were invented by Apple (both have history in NextOS/Openstep)

[omh]

both have history in NextOS/Openstep

But OS X basically is NextOS isn't it?

[papercrane]

Well I think the history is more complicated then that, but yes, OS X has some code and ideas from NextOS/Openstep.