SPELL reads text files and notifies you of each occurrence of a wrongly spelled
word.  If it has never seen the word before, it will ask you if it is correctly
spelled or not.  It will also make a copy of your file with all the changes you
have requested, using the same name as the original,  but with a higher version
number - just like the editor. 

SPELL     -  Starts checking a file.  You will be prompted for a file name. You
             can also specify the file name directly on the VMS command line.

CHECK     -  Allows you to check if a word is in the dictionary.

UPDATE    -  Allows system people to update the contents of the main dictionary
             files.

PERSONAL  -  Allows you list and edit the contents of your personal dictionary.
             N.B. You should *never* use an editor to alter this file directly!