\ifx\documentstyle\thisMacroOughtNotBeDefined
\else
  \immediate\write16{}
  \immediate\write16{ This is a plain TeX document, not LaTeX; process with}
  \immediate\write16{ tex \jobname}
  \batchmode \makeatletter @@end
\fi

\special{header=duplex}  % be double-sided

\hbadness=10000  \vbadness=10000            % shut up about underful boxes!
\nopagenumbers

\font\small=ptmr8r at 7pt  % times-roman
\font\normalsize=cmr10
\font\large=cmr12 scaled\magstep1
\font\huge=cmr12 scaled\magstep5

\def\ifundef#1{\expandafter\ifx\csname#1\endcsname\relax}
\newif\ifshelf   \ifundef{Shelf}   \shelffalse   \else \shelftrue   \fi
\newif\ifreverse \ifundef{Reverse} \reversefalse \else \reversetrue \fi
\newif\ifsupple  \ifundef{Supple}  \supplefalse  \else \suppletrue  \fi

\small
\hoffset=-.25in  \hsize=7in                 % big enough for punched holes
\ifshelf \voffset=.5in \vsize=9.25in \else \voffset=-.25in \vsize=10in \fi
\emergencystretch \hsize
\raggedright
\leftskip=1em  \parindent=-\leftskip        % indent every line *after* first
\tolerance=10000  \pretolerance=\tolerance  % always go for breaks
\linepenalty 10000                          % always minimize #lines
\adjdemerits 0                              % don't care much re tight/loose
\baselineskip=0pt \lineskiplimit=100ex      % always fall back to \lineskip
\lineskip 1.25ex
\hyphenpenalty 10000                        % mostly for codes' sakes

\catcode`|=13  \def|{/\penalty-9000}
\catcode`[=13  \def[{\penalty-7000\char`[}
\catcode`(=13  \def({\penalty-5000\char`(}
\catcode`:=13  \def:{\char`:\penalty-3000{}}
\def\:{\char`:}  % colons in shelfcodes get backslashed and aren't breakpoints
\catcode`;=13  \def;{\char`;\penalty-3000{}}
\catcode`,=13  \def,{\char`,\penalty-1000{}}
\def\,{\char`,}  % commas in series get backslashed and aren't good breakpoints

\newdimen\Authordim
\newdimen\Titledim  
\newdimen\Codedim   
\ifshelf
  \Authordim=.35\hsize
  \Titledim =.55\hsize
  \Codedim  =.06\hsize
\else
  \Authordim=.30\hsize
  \Titledim =.50\hsize
  \Codedim  =.15\hsize
\fi

% the wacky stuff is mostly for Shelfdex only (with headline excluded)
\newcount\nbook
\def\ifnormalbook{\ifnum\deadcycles=0}  % headlines are only pseudo-books
\def\Maybreak{\ifnormalbook \advance\nbook by 1\relax
                \ifnum\nbook=\Shelf \Setbreak \nbook=0\relax \fi \fi}
% \Setbreak can also appear directly in the main body
\def\Setbreak{\vskip 2pt \hrule \vskip 2pt \vfil\penalty-500\vfilneg}
\def\Err#1{\ifnormalbook $\approx\ \cal{M}$\else#1\fi}

% \fbox stolen straight from latex2.09
\newdimen\fboxrule \fboxrule=0.2pt
\newdimen\fboxsep  \fboxsep=1pt
\long\def\fbox#1{\leavevmode\setbox0\hbox{#1}\dimen0\fboxrule
    \advance\dimen0\fboxsep\relax \advance\dimen0\dp0\relax
   \hbox{\lower \dimen0\hbox
  {\vbox{\hrule height\fboxrule
          \hbox{\vrule width\fboxrule \hskip\fboxsep
          \vbox{\vskip\fboxsep \box0\vskip\fboxsep}\hskip
                 \fboxsep\vrule width\fboxrule}%
                 \hrule height\fboxrule}}}}
\newcount\nbullet
\def\bull#1{\ifnormalbook\nbullet=#1{}\space\fbox
   {\ifnum\nbullet=0\relax(none)\else\dobullet\fi}\fi}
\def\dobullet{%
  \ifnum\nbullet>0\relax
    \hbox{$\circ$}%
    \advance\nbullet by -1\relax
  \fi
  \ifnum\nbullet<0\relax
    \hbox{\tt x}%
    \advance\nbullet by +1\relax
  \fi
  \ifnum\nbullet=0\else\space\expandafter\dobullet\fi
}

\def\Column#1#2{\hbox to #1{\vtop{\hsize=#1 #2}}}
\edef\Book#1#2#3{\line{
	\ifshelf
	  \Column{\Codedim}{\noexpand\Err{#3}}
	  \hfil
	\fi
	\ifreverse\Column{\Titledim}{#2\ifshelf\noexpand\bull{#3}\fi}
	     \else\Column{\Authordim}{#1}\fi
	\hfil
	\ifreverse\Column{\Authordim}{#1}\else\Column{\Titledim}{#2}\fi
        \ifshelf\else
  	  \hfil
	  \Column{\Codedim}{#3}
	\fi
	} \ifshelf\noexpand\Maybreak\else\filbreak\fi
}
\def\NextLetter{\ifodd\pageno\vfill\eject\ \fi\vfill\eject}

\edef\Name{The MITSFS \dexname}
\edef\thismonth{\ifcase\month\or January\or February\or March\or April\or 
	May\or June\or July\or August\or September\or October\or November\or 
	December\fi}
\edef\today{\thismonth\ \number\day\string, \number\year}
\edef\When{\ifsupple\Supple\else\today\fi}
\def\Page{Page \the\pageno}  % shelfdex may redefine, below
\def\Lead{\leaders\hrule height.675ex depth-.625ex \hfill}
\def\Cen#1{\strut \Lead #1\Lead \strut}
\headline={\vbox{
    \ifreverse\Book{\When}{\Name}{\Page}\else\Book{\Name}{\When}{\Page}\fi
    \Book{\Cen{AUTHOR}}{\Cen{TITLE}}{\Cen{\ifshelf ERR\else CODE\fi}}
}}

% Seriesdex starts with a list of the series names
\def\Series#1#2#3{\line{
	\Column{.07\hsize}{\hfill#3}
	\hfil
	\Column{.40\hsize}{#1}
	\hfil
	\Column{.45\hsize}{#2}
}}
\def\beginserieslist{\begingroup
	\headline={\vbox{
	\Series{MITSFS \dexname\ \it(Quick List of Serieses)}{\When}{\Page}
	\Series{\Cen{SERIES}}{\Cen{AUTHOR}}{\Cen{ENTRIES}}
}}}
\def\endserieslist{\vfill\eject\endgroup
	\ifodd\pageno\else{\headline={}\ \vfill\eject}\fi\pageno=1\relax}

% Shelfdex may (but doesn't always) define \chunk (and then insert some).
\ifundef{chunk}\else
  \countdef\chunkno=0\relax \countdef\pageno=1\relax
  \def\Page{Page \the\chunkno.\the\pageno}
  \chunkno=1\relax \pageno=1\relax
  \def\chunk{%
    \vfill\eject
    \ifodd\pageno\else
      { \headline={}\chunkno=0\relax\pageno=0\relax \ \vfill\eject }%
    \fi
    \advance\chunkno by 1\relax \pageno=1\relax
    \nbook=0\relax
  } 
\fi

\newtoks\realheadline
\ifshelf
  \realheadline=\headline
  \headline={%
    \ifnum\pageno=1\relax
      \vbox{%
        \vbox to 0pt{%
          \vskip-1in
          \normalsize
          \def\say#1{\hbox to 0pt{\hskip1cm #1\hskip10in}}
          \def\blank#1{$\underline{\hskip#1}$}
          \say{Workers: \blank{1.5in}}
          \say{\hbox to .5\hsize{Start time: \blank{1in}}
               Panthercomm intra-Inven: \blank{1in}}
          \say{\hbox to .5\hsize{End time: \blank{1in}}
               Panthercomm post-Inven: \blank{1in}}
        }%
      }%
    \fi
  \the\realheadline  
  }%
\fi