1 CB
 Allows you to communicate with any other user that is currently logged
 in to VAX/VMS, regardless of terminal type.

 Format:

       $ RUN UTIL$EXE:CB

2 Handles
 Your "handle" is the name by which you are known while running CB/Vax.
 While there aren't any rules for choosing handles we recommend that,
 when you are engaged in serious conversation, you use your real name.
 Your handle is remembered for your entire timesharing session, even if
 you exit CB/Vax and re-enter it.  This is done by defining a global
 symbol which you may want to do in your LOGIN.COM file.  Insert a line
 of the form

       $ CB_HANDLE :== "your handle"

 Then, you will never be asked for your handle.  You can change your handle
 while in CB/Vax by using the /HAN command.

2 Commands
 All CB/Vax commands are typed while in the program, and are prefaced by
 a slash (/).  Only enough of each command to distinguish it from any
 other command need be typed.

2 Channels
 CB/Vax offers 40 channels on which separate conversations may be held
 simultaneously.  When you enter the program, you are placed on channel
 1.  Use the /TUN command to change your channel.

2 /EXIT
 Performs an orderly exit from CB/Vax.  Note that control-C and control-Y
 will NOT exit from the utility.

2 /HANDLE
 Allows you to change your handle while running CB/Vax.  You will be 
 prompted for your new handle, which can not match any handle that is
 currently running CB/Vax.  Choosing an invalid handle will cause your
 handle to be set to your terminal name.

2 /STATUS
 Prints a brief list of activity on each of the 40 CB/Vax channels.  Each
 item is of the form "(n)p", where "n" is the channel number and "p" is
 the number of people on that channel.  Additionally, a "#" is displayed
 following the channel to which you are currently tuned.

2 /SUMMON
 Calls another user and requests that the user also run CB/Vax.  The
 user will get a message of the form

        handle(user) requests your presence on CB.

 where "handle" is your current handle, and "user" is your username.
 All users logged in to the specified username will be summoned.  Note
 that this message is issued only once per command and does not repeat
 like the PHONE command.

 Format:

        /SUMMON username
2 /TUNE
 Changes your CB/Vax channel.  Channels 1-40 are defined.

 Format:

        /TUNE n

 where "n" is the new channel number.

2 /USTAT
 Prints a detailed report of all current CB/Vax users.  The list includes
 each user's terminal, UIC, channel, and handle.
