diff --git a/scribble-doc/scribblings/scribble/style.scrbl b/scribble-doc/scribblings/scribble/style.scrbl
index fc4e60b3..bc0252e3 100644
--- a/scribble-doc/scribblings/scribble/style.scrbl
+++ b/scribble-doc/scribblings/scribble/style.scrbl
@@ -56,10 +56,10 @@ than a hidden abstraction in the document implementation.
 
 Hyphenate the words ``sub-form'' and ``sub-expression.''
 
-Use ``Windows,'' ``Mac OS X,'' and ``Unix'' for the three
+Use ``Windows,'' ``Mac OS,'' and ``Unix'' for the three
 ``platforms'' (as opposed to ``systems'') on which Racket runs. Use
 ``Unix'' as a generic term for Unix-like operating systems---notably
-including Linux---other than Mac OS X. Use ``Unix'' even when ``Gtk''
+including Linux---other than Mac OS. Use ``Unix'' even when ``Gtk''
 or ``the X11 windowing system'' would be more precisely correct, but
 use ``X11'' as adjective when necessary, such as ``X11 display.''
 Racket runs ``on'' a platform, as opposed to ``under'' a platform.