name
    One of the following values:
    o  HOME-Your login directory
    o  TERM-The type of terminal being used
    o  PATH-The default device and directory
    o  USER-The name of the user who initiated the process
    o  Logical name or command-language interpreter (CLI) symbolic
       name
    o  An environment variable set with setenv or putenv
    The case of the specified name is important.