A system for conducting electronic commerce comprising at least one client computer system, a vendor computer system and a merchant computer system, interconnected via the communication link. The client computer and the vendor computer system are configured to establishing a secure link communication between the client computer system and the vendor computer system and transmit transaction information between the client and vendor computer systems enabling a user at the client computer system to select and purchase, via the vendor computer system, items listed in at least the merchant computer systems by one or more merchants.