diff --git a/progs/demos/fire.c b/progs/demos/fire.c
index d1081fb..dd70f61 100644
--- a/progs/demos/fire.c
+++ b/progs/demos/fire.c
@@ -304,7 +304,7 @@
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
 
    glRasterPos2i(60, 390);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Togle Help");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
 
    glRasterPos2i(60, 360);
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Increase particle size");
@@ -317,9 +317,9 @@
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "R - Decrease emission radius");
 
    glRasterPos2i(60, 240);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Togle Fog");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
    glRasterPos2i(60, 210);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "s - Togle shadows");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "s - Toggle shadows");
    glRasterPos2i(60, 180);
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
    glRasterPos2i(60, 150);
@@ -330,7 +330,7 @@
    glRasterPos2i(60, 90);
    if (joyavailable)
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
-		  "j - Togle jostick control (Joystick control available)");
+		  "j - Toggle jostick control (Joystick control available)");
    else
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
 		  "(No Joystick control available)");
diff --git a/progs/demos/rain.cxx b/progs/demos/rain.cxx
index e183978..d19f049 100644
--- a/progs/demos/rain.cxx
+++ b/progs/demos/rain.cxx
@@ -146,10 +146,10 @@
   printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Help");
 
   glRasterPos2i(60,390);
-  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"h - Togle Help");
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"h - Toggle Help");
 
   glRasterPos2i(60,360);
-  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"f - Togle Fog");
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"f - Toggle Fog");
   glRasterPos2i(60,330);
   printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Arrow Keys - Rotate");
   glRasterPos2i(60,300);
diff --git a/progs/demos/ray.c b/progs/demos/ray.c
index fbee960..eb1d19f 100644
--- a/progs/demos/ray.c
+++ b/progs/demos/ray.c
@@ -269,13 +269,13 @@
    printstring(GLUT_BITMAP_HELVETICA_18, "Help");
 
    glRasterPos2i(60, 390);
-   printstring(GLUT_BITMAP_HELVETICA_12, "h - Togle Help");
+   printstring(GLUT_BITMAP_HELVETICA_12, "h - Toggle Help");
    glRasterPos2i(60, 370);
-   printstring(GLUT_BITMAP_HELVETICA_12, "f - Togle Fog");
+   printstring(GLUT_BITMAP_HELVETICA_12, "f - Toggle Fog");
    glRasterPos2i(60, 350);
-   printstring(GLUT_BITMAP_HELVETICA_12, "b - Togle Back face culling");
+   printstring(GLUT_BITMAP_HELVETICA_12, "b - Toggle Back face culling");
    glRasterPos2i(60, 330);
-   printstring(GLUT_BITMAP_HELVETICA_12, "p - Togle Wire frame");
+   printstring(GLUT_BITMAP_HELVETICA_12, "p - Toggle Wire frame");
    glRasterPos2i(60, 310);
    printstring(GLUT_BITMAP_HELVETICA_12, "Arrow Keys - Rotate");
    glRasterPos2i(60, 290);
@@ -286,7 +286,7 @@
    glRasterPos2i(60, 250);
    if (joyavailable)
       printstring(GLUT_BITMAP_HELVETICA_12,
-		  "j - Togle jostick control (Joystick control available)");
+		  "j - Toggle jostick control (Joystick control available)");
    else
       printstring(GLUT_BITMAP_HELVETICA_12,
 		  "(No Joystick control available)");
@@ -300,11 +300,11 @@
 
    glRasterPos2i(60, 190);
    printstring(GLUT_BITMAP_HELVETICA_12,
-	       "1 - Togle the plane texture map window");
+	       "1 - Toggle the plane texture map window");
 
    glRasterPos2i(60, 170);
    printstring(GLUT_BITMAP_HELVETICA_12,
-	       "2 - Togle the sphere texture map window");
+	       "2 - Toggle the sphere texture map window");
 }
 
 static GLboolean
diff --git a/progs/demos/teapot.c b/progs/demos/teapot.c
index 5a50447..38ede7a 100644
--- a/progs/demos/teapot.c
+++ b/progs/demos/teapot.c
@@ -250,13 +250,13 @@
   printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Help");
 
   glRasterPos2i(60,390);
-  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"h - Togle Help");
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"h - Toggle Help");
   glRasterPos2i(60,360);
-  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"t - Togle Textures");
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"t - Toggle Textures");
   glRasterPos2i(60,330);
-  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"f - Togle Fog");
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"f - Toggle Fog");
   glRasterPos2i(60,300);
-  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"b - Togle Back face culling");
+  printstring(GLUT_BITMAP_TIMES_ROMAN_24,"b - Toggle Back face culling");
   glRasterPos2i(60,270);
   printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Arrow Keys - Rotate");
   glRasterPos2i(60,240);
@@ -266,7 +266,7 @@
 
   glRasterPos2i(60,180);
   if(joyavailable)
-    printstring(GLUT_BITMAP_TIMES_ROMAN_24,"j - Togle jostick control (Joystick control available)");
+    printstring(GLUT_BITMAP_TIMES_ROMAN_24,"j - Toggle jostick control (Joystick control available)");
   else
     printstring(GLUT_BITMAP_TIMES_ROMAN_24,"(No Joystick control available)");
 }
diff --git a/progs/demos/terrain.c b/progs/demos/terrain.c
index 990c7b8..be78ea4 100644
--- a/progs/demos/terrain.c
+++ b/progs/demos/terrain.c
@@ -229,15 +229,15 @@
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
 
    glRasterPos2i(60, 390);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Togle Help");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
    glRasterPos2i(60, 360);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Togle Textures");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
    glRasterPos2i(60, 330);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Togle Fog");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
    glRasterPos2i(60, 300);
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "p - Wire frame");
    glRasterPos2i(60, 270);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Togle Back face culling");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
    glRasterPos2i(60, 240);
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
    glRasterPos2i(60, 210);
@@ -248,7 +248,7 @@
    glRasterPos2i(60, 150);
    if (joyavailable)
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
-		  "j - Togle jostick control (Joystick control available)");
+		  "j - Toggle jostick control (Joystick control available)");
    else
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
 		  "(No Joystick control available)");
diff --git a/progs/demos/tunnel.c b/progs/demos/tunnel.c
index a47b916..6a24058 100644
--- a/progs/demos/tunnel.c
+++ b/progs/demos/tunnel.c
@@ -300,15 +300,15 @@
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
 
    glRasterPos2i(60, 390);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Togle Help");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
    glRasterPos2i(60, 360);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Togle Textures");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
    glRasterPos2i(60, 330);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Togle Fog");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
    glRasterPos2i(60, 300);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Togle strips");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Toggle strips");
    glRasterPos2i(60, 270);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Togle Back face culling");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
    glRasterPos2i(60, 240);
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
    glRasterPos2i(60, 210);
@@ -319,7 +319,7 @@
    glRasterPos2i(60, 150);
    if (joyavailable)
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
-		  "j - Togle jostick control (Joystick control available)");
+		  "j - Toggle jostick control (Joystick control available)");
    else
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
 		  "(No Joystick control available)");
diff --git a/progs/demos/tunnel2.c b/progs/demos/tunnel2.c
index 14248c0..75a199a 100644
--- a/progs/demos/tunnel2.c
+++ b/progs/demos/tunnel2.c
@@ -324,15 +324,15 @@
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
 
    glRasterPos2i(60, 390);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Togle Help");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
    glRasterPos2i(60, 360);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Togle Textures");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
    glRasterPos2i(60, 330);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Togle Fog");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
    glRasterPos2i(60, 300);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Togle strips");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Toggle strips");
    glRasterPos2i(60, 270);
-   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Togle Back face culling");
+   printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
    glRasterPos2i(60, 240);
    printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
    glRasterPos2i(60, 210);
@@ -343,7 +343,7 @@
    glRasterPos2i(60, 150);
    if (joyavailable)
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
-		  "j - Togle jostick control (Joystick control available)");
+		  "j - Toggle jostick control (Joystick control available)");
    else
       printstring(GLUT_BITMAP_TIMES_ROMAN_24,
 		  "(No Joystick control available)");