\documentstyle[epsfig,12pt]{article}

% do figures as follows:
%\begin{figure}
%\psfig{figure=epsfigurefile.eps}
%\caption{Figure caption.}
%\label{figurelabel}
%\end{figure}

% make units in Roman type with space before
\newcommand{\unit}[1]{\mbox{ #1}}

% make sgn roman
\newcommand{\sgn}{\mbox{sgn}}

% bold math characters
\newcommand{\bold}[1]{{\bf #1}}

% make double space (2) or single space (1)
\renewcommand{\baselinestretch}{1}

% centered unnumbered section head
\newcommand{\csection}[1]{\begin{center}{\Large\bf #1}\end{center}}

\begin{document}

\section{Title of Document}

\end{document}
