\documentstyle[11pt,twoside,S]{article}
\title{Classes, Functions, and Methods: \\
Object-oriented Programming in S
}
\author{John M. Chambers \\
AT\&T Bell Laboratories, Murray Hill, New Jersey}
\begin{document}
\maketitle
\tableofcontents
\begin{abstract}
\input{classabs}
\end{abstract}
\input{class}
\input{classref}
\end{document}