detects that its standard output is not a terminal, however, it will
bypass the pager and just write out the article directly.
-There is an alternative mode of operation, enabled by the \cw{-a}
-option, in which \cw{nntpid} retrieves \e{all} available articles in
-the group and writes them to standard output in \cw{mbox} format.
+There are a couple of alternative mode of operation. In one, enabled
+by the \cw{-a} option, \cw{nntpid} retrieves \e{all} available
+articles in the group and writes them to standard output in \cw{mbox}
+format. In the other, enabled with \cw{-b}, \cw{nntpid} simply prints
+the lowest and highest article numbers currently available in that
+group from the news server.
The location of the news server is obtained by reading the
environment variable \cw{NNTPSERVER}, or failing that the file
\cw{nntpid} will always write straight to standard output (so the
\cw{-d} option is unnecessary).
+\dt \cw{-b}
+
+\dd Print the current bounds on that group's article numbers. The
+output is one line consisting of a minimum and maximum article number.
+(Not every article in that range will necessarily actually exist: a
+cancelled article will still use up a space in the numbering range.)
+
\U AUTHENTICATION
Currently, the only form of authentication supported by \cw{nntpid}