\documentstyle[11pt,makeidx]{book}
\setlength{\parindent}{0pt}
\setlength{\parskip}{6pt}
\setlength{\hfuzz}{5pt} % don't complain about tiny overfull boxes
\setlength{\vfuzz}{1pt}
\renewcommand{\sloppy}{\tolerance=9999\relax%}
\setlength{\emergencystretch}{0.2\hsize}}
\tolerance=1000
\raggedbottom
\newlength{\reduceboxwidth}
\setlength{\reduceboxwidth}{4in}
\newlength{\redboxwidth}
\setlength{\redboxwidth}{3.5in}
\newlength{\rboxwidth}
\setlength{\rboxwidth}{2.6in}
\newcommand{\REDUCE}{REDUCE}
\newcommand{\RLISP}{RLISP}
\newcommand{\underscore}{\_}
\newcommand{\ttindex}[1]{{\renewcommand{\_}{\protect\underscore}%
\index{#1@{\tt #1}}}}
\newcommand{\COMPATNOTE}{{\em Compatibility Note:\ }}
% \meta{...} is an alternative sentential form in descriptions using \it.
\newcommand{\meta}[1]{\mbox{$\langle$\it#1\/$\rangle$}}
% Close up default vertical spacings:
\setlength{\topsep}{0.5\baselineskip} % above and below environments
\setlength{\itemsep}{\topsep}
\setlength{\abovedisplayskip}{\topsep} % for "long" equations
\setlength{\belowdisplayskip}{\topsep}
\newcommand{\key}[1]{\fbox{\sf #1}}
\newcommand{\extendedmanual}[1]{}
\pagestyle{headings}