During development, team members continually make changes to project
 files.   CMS stores, keeps track of, and monitors these files (called
 elements).  CMS also lets you manipulate combinations of files within
 a library (called groups and classes).
 CMS stores project files in a central library where they are available
 to all project members.  Some of the functions you can perform using
 CMS include the following:
      (1) Store elements in a library for safekeeping
      (2) Retrieve elements, and modify and test them in your own
          directory
      (3) Control concurrent modifications to the same element
      (4) Merge concurrent modifications to a file
      (5) Create successive versions, or generations, of files
      (6) Compare two versions of an element within a library
      (7) Organize related library elements into groups
      (8) Define a set of various element generations (called a class)
          to make up a baselevel or release version of a project
      (9) Track which users are working on which files from the library
     (10) Maintain a historical account of element and library
          transactions
 A CMS library can store any type of file except for a directory file.
      (1) HELP CMS New_User explains how to invoke CMS.
      (2) HELP CMS CREATE LIBRARY tells how to establish a new project
          library.
      (3) HELP CMS gives a list of topics on which help is available.