Complex sentence: Client/Server Runtime Subsystem, or csrss.exe, is a component of the Microsoft Windows NT operating system that provides the user mode side of the Win32 subsystem and is included in Windows 2000, XP, 2003, Vista, Server 2008 and 7.
Split into simpler sentences: Client/Server Runtime Subsystem, or csrss.exe, is a component of the Microsoft Windows NT operating system. It provides the user mode side of the Win32 subsystem and is included in Windows 2000, XP, 2003, Vista, Server 2008 and 7.