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Yet windows 95 is nearly identical to windows 7 :D

Under the hood, Windows 95 had a heck of a lot in common with Windows 3.1 -- with the exception of the look and feel (desktop and window manager), and a more complete Win32 thunking subsystem.

Windows NT 3.1, which had a look and feel very similar to Windows 3.1, had more in common under the hood with most modern versions of Windows than Windows 95 did.
 
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