[Defines the user's shell search path.] PATH=$PATH:$HOME/bin:/usr/local/bin:/usr/ccs/bin:.
 [Defines the path to the user's mail file.] MAIL=/var/mail/$LOGNAME
 [Defines the environment variable to the user's Usenet news server. ] NNTPSERVER=server1
 [Defines the user's search path for man pages.] MANPATH=/usr/share/man:/usr/local/man
 [Defines the user's default printer. ] PRINTER=printer1
 [Sets the user's default file creation permissions. ] umask 022	
 [Sets the listed environment variables.] export PATH MAIL NNTPSERVER MANPATH PRINTER