Remind me how many disks were included with Diablo 2 in order to install the game?

I've lost count of how many disks WoW has..

I ain't no tree hugger.. But an apocalypse in 2012 will be highly likely if Diablo 3 comes with more than one installation disk!

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Q u o t e:
I've lost count of how many disks WoW has..

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0

Digital download ftw.

Why is there a second thread about this?