If I look at the man page for mutt it has this at the bottom.

SEE ALSO
curses(3), mailcap(5), maildir(5), mbox(5), mutt_dotlock(1), muttrc(
ncurses(3), sendmail(1), smail(1).

Mutt Home Page: http://www.mutt.org/

The Mutt manual


I wanted to look up ncurses, so I typed "man ncurses" but it said there was no man entry for it. So where am I supposed to find that reference? What is the (3) for?

Usually typing 'man {topic}' should do but at times there's no manual page in the default section or no redirect or whatever and then you have to explicitly type 'man {section} {topic}' as in 'man 3 ncurses'. (Section 1 has system commands, 2 and 3 programming related stuff, 4 and up (at least for me) contain anything from concepts, system commands and programming.) That doesn't mean that manual pages don't suffer from bit rot or bad edits. Sometimes there'll be no {topic} in {section} or worse no {topic} at all. To find out which pages are available try 'apropos curses' or 'man -k curses'.

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you must see man man
use man -k "ncurses"
it will show you in which sections ncurses resides in man database
and then provide the command
man <section-number> ncurses

Well, the links at the bottom of http://linux.die.net/man/1/mutt work if shown as hyperlinks.