\documentstyle[11pt]{letter}
\signature{Robert Geist \\ Professor}
\address{\hspace*{1in}}
\begin{document}
\begin{letter}
{Professor Cherri M. Pancake\\
Dept. of Computer Science and Engineering\\
107 Dunstan Hall\\
Auburn University\\
Auburn, Alabama 36869}

\opening{Dear Professor Pancake:}

Enclosed please find a camera-ready copy of our
paper, ``Disk Performance Enhancement through 
Markov-based Cylinder Remapping,'' for
the Proceedings of the $30^{th}$ ACM Southeast Regional Conference.
We have also enclosed the signed ACM copyright form.

We're looking forward to the conference!

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\closing{Sincerely,}
\end{letter}
\end{document}