Abstract: Servers connected to the World Wide Web serve website account pages to the computers of system participants. The system is organized around two classes of participants: buyers and suppliers. Each buyer maintains an account, including website folders and subfolders, at the Website at which she can post to a Web page in the site the specifications and particulars of a project. Each supplier, likewise, maintains an account at the Website at which he can post to a Web page all, or a select portion, of the goods and services that supplier provides. Buyers inspect the company information of suppliers with whom the Buyer has an existing or purchased relationship, to identify suppliers of the goods or services required for the project. When a buyer identifies a relevant supplier, the buyer privately invites one or more supplier to bid on the project. Each supplier evaluates the project and bid request and responds to the invitation by privately submitting a bid to the buyer.