An electronic procurement session is conducted between a host and a user needing to procure products or services on behalf of an organization. An established contract for the purchase and sales of products/services between a supplier and the organization is the basis for constructing a set of pre-priced items that may be supplied to the organization. A bi-directional electronic communication interface using protocols of the World Wide Web is established between the host and the user and provides the user with access to web-pages which are displayed on the user's computer using a standard Web browser. In response to user information, a subset of the set of pre-priced items is displayed on web-pages and served by the host to the user. Orders for user-selected items from the displayed web-pages are forwarded to a vendor for order fulfillment. The fulfilling vendor and the host have established in advance of the order forwarding that the order will be fulfilled by the vendor in accordance with the terms of the established contract.