This section describes the "normal" or generic operation of the BBS. This operation is driven by scripts in the Home stack, particularly those for the openCard and idle messages.
Many of the cards and backgrounds that make up HyperBBS modify the way this generic procedure actually operates. This can be done easily because of the message/method facility of HyperTalk. A card that wants to modify the normal operation simply intercepts some or all of the messages and do something else instead. HyperBBS is explicitly designed with this sort of interception in mind.