-{\program ctsim} is the graphical shell for the CTSim project. {\program ctsim} has most of the capabilities of the CTSim project. There are still functions that are only available to the command line tools.
-\section{tools - The Command Line Lnterface}
+\ctsim\ is the graphical shell for the CTSim project. It is
+written using the wxLibrary for cross-platform compatibility with GTK,
+Motif, and Microsoft Windows.
+
+\ctsim\ incorporates most of the capabilities of the CTSim
+project. There are still functions that are only available to the
+command line tools.
+
+\subsection{Usage}
+ctsim [OPTIONS] [files to open...]
+
+\ctsim\ can open projection files and image files.
+
+\section{The Web Browser CGI Interface}
+\subsection{Overview}
+The CGI program {\tt ctsim.cgi} takes projections of a standard
+phantom object, performs reconstruction, and then compares the
+rasterized phantom object with the reconstruction. The comparison is
+performed both visually by an image subtraction as well as by standard
+statistics as described by Herman\cite{HERMAN80}.
+
+\section{tools - The Command Line Interface}