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Trailing-Edge - PDP-10 Archives - BB-PBQUC-BM_1990 - help/question-marks.hlp
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Question Marks

Whenever you type a question mark (?)  instead  of  (or  even  in  the
middle  of) a TOPS-20 command or command argument, the system responds
with instructions  or  a  list  of  possible  completions.   By  using
question  marks  and  recognition  when  you  are unsure of the proper
command or argument, you can have the  system  help  you  during  your
terminal session.

For TOPS-20 Version 7, new functionality has been added  to  make  the
question  mark  feature  more  useful.   More possible completions and
choices are now listed.  In addition to possible command names  listed
in  response  to  a  question  mark, the system also displays possible
filenames from the system (SYS:) directory.  For example:

     @L ? Command, one of the following
        LOAD    LOGOUT
         or system program name
        LOGIN
        LOGOUT

Where the LOGIN and LOGOUT that appear after "or system program  name"
are files from the system directory that start with L.

The functionality of the question mark feature has been  expanded  for
file  specifications  also.   Question mark lists possible file names,
extenstions (including nulls), and file version numbers.  For example:

     @DIRECTORY E? FILE NAME
        EXTRA
        EXTUSR
        EMACS
     @DIRECTORY EMACS.? FILE NAME
        INIT
        VARS
     @DIRECTORY EMACS.INIT.? FILE NAME
       1
       2