Code Management System for OpenVMS (CMS) is a library
  system for software development and maintenance.

  During development, team members continually make changes
  to project files. CMS stores, tracks, and records user
  access and modifications to these files (called
  elements).  Elements are stored in one or more central
  libraries where they are available to all project
  members.

  For information about using CMS, double click on an
  item from the list of additional topics below.

  To invoke CMS in the character-cell (terminal)
  environment, type the following command at the DCL
  command-line prompt:  $ CMS/INTERFACE=CHARACTER_CELL.

  If you see a topic that lists no additional topics,
  click on the Go Back button or choose On Window
  from the Help Menu in the main CMS window.

  For information about using help, choose Using Help
  from the Help menu above.