 \topmargin -.25in \headheight 0pt \headsep 0pt \footheight 0pt \footskip 0pt
 \textheight 9.3125in
 \oddsidemargin -.2in \evensidemargin -.2in \textwidth 6.9in \columnsep
 .3333in \columnseprule 0pt
 % ACM specs suggest a textwidth of 7.0 and sidemargins of -.25,
 % but LaTeX and my Laserwriter need the fudged values above to comply.

 \def\@oddhead{}\def\@evenhead{}
 \def\@oddfoot{}\def\@evenfoot{}

 \def\maketitle{\par
  \begingroup
  \def\thefootnote{\fnsymbol{footnote}}
  \def\@makefnmark{\hbox
  to 0pt{$^{\@thefnmark}$\hss}}
  \twocolumn[\@maketitle]
  \@thanks
  \endgroup
  \setcounter{footnote}{0}
  \let\maketitle\relax
  \let\@maketitle\relax
  \gdef\@thanks{}\gdef\@author{}\gdef\@title{}\let\thanks\relax}
 \def\@maketitle{\vbox to 2.4in{\hsize\textwidth
  \linewidth\hsize \vfil \centering
  {\LARGE \@title \par} \vskip 2em {\large \begin{tabular}[t]{c}\@author
 \end{tabular}\par}
  \vfil}}

 \def\copyrightspace{\insert\footins{\footnotesize
     \interlinepenalty\interfootnotelinepenalty
     \splittopskip\footnotesep
     \splitmaxdepth \dp\strutbox \floatingpenalty \@MM
     \hsize\columnwidth \@parboxrestore
     \mbox{}\vrule height 1in width 0pt
     {\rule{\z@}{\footnotesep}\ignorespaces\strut}}}

 \def\abstract{\section*{Abstract}}
 \def\endabstract{\par}
 \twocolumn
 \sloppy
 \parindent 1em
 \leftmargini 2em
 \leftmargin\leftmargini
 \leftmarginv .5em
 \leftmarginvi .5em
 \flushbottom
