diff --git a/winsup/doc/what.texinfo b/winsup/doc/what.texinfo
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 @chapter What is it?
 
-The Cygwin tools are ports of the popular GNU development tools
-for Windows NT, 95, and 98.  They run thanks to the Cygwin library which
-provides the UNIX system calls and environment these programs expect.
+The Cygwin tools are ports of the popular GNU development tools for
+Windows NT, 95, 98 and 2000.  They run thanks to the Cygwin library
+which provides the UNIX system calls and environment these programs
+expect.
 
 With these tools installed, it is possible to write Win32 console or
 GUI applications that make use of the standard Microsoft Win32 API