The messages generally aren't saved, so you can get replies only from people who are in the chat room while you are there. List servers broadcast your note to all participants, so a note you post today may not be seen by person A for several days, and his response may trigger a reply from person B several days later. Messages are not saved by the server after they have been sent out. Participants may get a lot of Email that isn't interesting to them. Lists may or may not have a monitor to screen messages so that only those that are pertinent and polite are distributed.
Message boards are archival entities that provide several options to participants.
Message boards may or may not have a monitor to screen notes so that only those that are pertinent and polite are posted. To get back to this page you will have to close the display program. You can do that by clicking on the little box with an X in it in the upper right corner of the screen that popped up to display the drawing. OK, now you may proceed with clicking on the link to display a small flag . Sounds can be loaded and played in a similar way.