diff --git a/documentation/src/forms.dox b/documentation/src/forms.dox
index 6060ac83e..c2379e983 100644
--- a/documentation/src/forms.dox
+++ b/documentation/src/forms.dox
@@ -45,7 +45,7 @@ C++ compiler.  The FLTK library does not provide C bindings or header
 files. 
 
 Although FLTK was designed to be compatible with the GL Forms
-library (version 0.3 or so), XForms has bloated severely and it's
+library (version 0.3 or so), XForms has bloated severely and its
 interface is X-specific.  Therefore, XForms compatibility is no longer
 a goal of FLTK.  Compatibility was limited to things that were free, or
 that would add code that would not be linked in if the feature is
@@ -81,7 +81,7 @@ Replace <tt>"boxtype"</tt> with <tt>"box()"</tt>.
 
 <tt>const char *</tt> arguments to most FLTK methods are simply
 stored, while Forms would \c strdup() the passed string.  This is
-most noticable with the label of widgets.  Your program must always
+most noticeable with the label of widgets.  Your program must always
 pass static data such as a string constant or malloc'd buffer to
 \c label().  If you are using labels to display program output you
 may want to try the Fl_Output widget. 
@@ -94,7 +94,7 @@ fdesign outputs a setting of a "fdui" instance variable to the main
 window.  I did not emulate this because I wanted all instance variables
 to be hidden.  You can store the same information in the \c user_data()
 field of a window.  To do this,  search through the fdesign output for all
-occurances of <tt>"->fdui"</tt> and edit to use <tt>"->user_data()"</tt>
+occurrences of <tt>"->fdui"</tt> and edit to use <tt>"->user_data()"</tt>
 instead.  This will require casts and is not trivial. 
 
 The prototype for the functions passed to \c fl_add_timeout()
diff --git a/documentation/src/glut.dox b/documentation/src/glut.dox
index 64ab5bbe6..83335588f 100644
--- a/documentation/src/glut.dox
+++ b/documentation/src/glut.dox
@@ -138,7 +138,7 @@ or make the window current.
 
 <tt>window->make_current()</tt> is the same as \p glutSetWindow(number).
 If the window has not had \p show() called on it yet, some functions
-that assumme an OpenGL context will not work. 
+that assume an OpenGL context will not work. 
 If you do \p show() the window, call \p make_current()
 again to set the context.
 
@@ -214,7 +214,7 @@ Fl_Glut_Window::Fl_Glut_Window(int w, int h, const char *title = 0)
 The first constructor takes 4 int arguments to create the window with
 a preset position and size.  The second constructor with 2 arguments
 will create the window with a preset size, but the window manager will
-choose the position according to it's own whims.
+choose the position according to its own whims.
 
 virtual Fl_Glut_Window::~Fl_Glut_Window()