      The SuperDot system is not an execution system, but rather an orderrouting system. (The "Dot" in SuperDot is an acronym for Designated OrderTurnaround). Instead of calling your broker, who then calls his clerk whois stationed at the floor booth on the exchange floor, who then pages hisfloor broker, who then walks over to the post to execute the trade with thespecialist, who then transmits the execution back to the clerk, who thencontacts your broker and tells him the execution, who then notifies you —the SuperDot is a way to electronically transmit your order directly to thespecialist, who can then electronically transmit your execution back toyou. This description is a very simplistic rendition of listed trading.Appendix A provides detailed descriptions of the different trading rules,patterns, and idiosyncrasies of listed trading.