The block diagram below is a client-side image map (CSIM) which conforms to the IETF draft standard (August 8, 1995). You must have NETSCAPE 2.0 or later to use the client-side imagemap feature. Click the left mouse key on each diagrammatic block for information about that specific topic. Click on your browser BACK symbol to return to the imagemap.
If your browser does not have CSIM capability, use the alphabetically arranged anchors located beneath the diagram. As with the entire VO FORUM, this area is undergoing constant evolution.