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This node is used to represent a user who can access the Adventure Builder application using a PC. It is most likely that he is using a web browser to place or track a purchaseorder.
Internet
TODO.
bank server machine
TODO. This node is external to the system. It represents the server hosted by a bank that provides services to verify a user's account.
airline provider server machine
TODO. This node is external to the system. It represents the server hosted by an airlines supplier that provides services to place a transportation purchase order.
lodging provider server machine
TODO. This node is external to the system. It represents the server hosted by a lodging supplier that provides services to place a lodging purchase order.
activity provider server machine
TODO. This node is external to the system. It represents the server hosted by an activities supplier that provides services to place an activities purchase order.
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