typos fixed by Rob Hooft
diff --git a/Demo/pdist/rcslib.py b/Demo/pdist/rcslib.py
index 223ddca..5e79247 100755
--- a/Demo/pdist/rcslib.py
+++ b/Demo/pdist/rcslib.py
@@ -296,7 +296,7 @@
     def _system(self, cmd):
         """INTERNAL: run COMMAND in a subshell.
 
-        Standard input for the command is taken fron /dev/null.
+        Standard input for the command is taken from /dev/null.
 
         Raise IOError when the exit status is not zero.
 
diff --git a/Demo/sgi/video/Vcopy.py b/Demo/sgi/video/Vcopy.py
index 0861457..ef4647a 100755
--- a/Demo/sgi/video/Vcopy.py
+++ b/Demo/sgi/video/Vcopy.py
@@ -8,7 +8,7 @@
 # - Manipulate the time base:
 #   = resample at a fixed rate
 #   = divide the time codes by a speed factor (to make it go faster/slower)
-#   = drop frames that are less than n msec apart (to accomodate slow players)
+#   = drop frames that are less than n msec apart (to accommodate slow players)
 # - Convert to a different format
 # - Magnify (scale) the image
 
diff --git a/Demo/sgi/video/Vtime.py b/Demo/sgi/video/Vtime.py
index 34b3b44..651deee 100755
--- a/Demo/sgi/video/Vtime.py
+++ b/Demo/sgi/video/Vtime.py
@@ -7,7 +7,7 @@
 #
 # - resample at a fixed rate
 # - divide the time codes by a speed factor (to make it go faster/slower)
-# - drop frames that are less than n msec apart (to accomodate slow players)
+# - drop frames that are less than n msec apart (to accommodate slow players)
 
 
 # Usage: