The  Software Tools on-line documentation is divided into several
sections.  The standard manual  sections  contain  the  following
information:

1 Writeups on the utilities available in the system (e.g. ed)
2 Writeups  on  the  virtual  machine  system  calls available to
  ratfor programmers. 
3 Writeups on library routines available to ratfor programmers. 
4 Primers on some of the more heavily used utilities. 

In  addition,  other  site-dependent  manual  sections   may   be
maintained by your system manager. 

Three  utilities are currently available for perusing the on-line
documentation: intro, apropos and man.  Specific information  can
be  obtained  on  each of these utilities by performing a command
of the form:

man NAME

where NAME is replaced by intro, apropos or man. 

In addition, some  of  the  more  heavily  used  forms  of  these
commands are listed below. 

man -s
     List all available manual sections. 

man -s1
     List all available entries in manual section 1. 

man ed
     List  the  manual  entry  on `ed'.  If entries exist in more
     than one section, only the first is displayed, with  a  note
     concerning  the  other entries displayed following the first
     entry. 

man -a -s2
     Display all entries in section 2. 

man -a
     Display all entries for all sections (the entire manual). 

intro -s2
     Display a one-line synopsis of all entries in section 2. 

apropos mail
     Display a one-line synopsis of all  entries  in  the  manual
     that match the pattern `mail'.