Complex sentence: DCOM is supported natively in Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003, as well as Windows 7, Windows 8, Windows Server 2008, Windows Server 2008 R2 and Windows Server 2012.
Split into simpler sentences: DCOM is supported natively in Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003. Besides this fact, the feature is still available on Windows 7, Windows 8, Windows Server 2008, Windows Server 2008 R2 and Windows Server 2012.