# Shared author affiliation in ACM Sig-proc

I had a paper in IEEE format, that was using \IEEEauthorblockN and \IEEEauthorblockA for shared affiliation, nicely as shown below. Now I need to change the format to ACM. How can I do the same thing to ACM Sig-proc format?

\documentclass[letterpaper]{sig-alternate}
%...
\newcommand{\superscript}[1]{\ensuremath{^{\textrm{#1}}}}
\def\sharedaffiliation{\end{tabular}\newline\begin{tabular}{c}}

\def\wu{\superscript{*}}
\def\wg{\superscript{\dag}}
%.... later
\author{\IEEEauthorblockN{aa\wu, bb\wu, cc\wu, dd\wu\wg, ff\wu}
\IEEEauthorblockA{
%  \sharedaffiliation
\begin{tabular}{ccc}
\wu Department of Computer Science & & \wg Department of Surgery \\
University         & & Hospital \\
\end{tabular}
~\\
Email: \{aa,bb,cc,dd,ff\}@university.edu}
}

• Please, make a full example showing also the document class you're loading. Oct 7 '15 at 15:46

Insert this piece of coding just before the

\begin{document}


like so...

%
\def\sharedaffiliation{%
\end{tabular}
\begin{tabular}{c}}
%
\begin{document}


and then adjust your particular 'author block' like so (example shown for 3 authors)...

\title{Alternate {\ttlit ACM} SIG Proceedings Paper in LaTeX
Format\titlenote{(Produces...}}

\numberofauthors{3}
% Three authors sharing the same affiliation.
\author{
\alignauthor Ben King\\
\email{king@cs.berkeley.edu}
%
\alignauthor Georgia Tobin\\
\email{tobin@cs.berkeley.edu}
%
\alignauthor Gerald Murray\\
\email{murrray@cs.berkeley.edu}
%
\sharedaffiliation
\affaddr{Department of Electrical Engineering and Computer Science}  \\
\affaddr{University of California, Berkeley }   \\