fixes #26

Author: Max-Hailperin

preface.tex

@@ -74,7 +74,7 @@ \section*{Systems Used as Examples}
 operating systems and, as such, are equally applicable to a range of
 specific versions.  Whenever Microsoft Windows is mentioned without
 further specification, the material should apply to Windows NT, Windows
-2000, Windows XP, Windows Server 2003, Windows Vista, Windows 2008, and Windows 7.  All Linux
+2000, Windows XP, Windows Server 2003, Windows Vista, Windows 2008, Windows 7, Windows 8, Windows 2012, and Windows 10.  All Linux
 examples are from version 2.6, though much of the material applies to
 other versions as well.  Wherever actual Linux source code is shown
 (or whenever fine details matter for other reasons), the specific subversion of