On-line ordering services in the field of steel products, namely, steel products for the construction industry and other industries; providing on-line business information to customers concerning the purchase of steel products, namely, information concerning the status of orders placed by the customer for the purchase of steel products, responses to customer inquiries concerning the purchase of steel products, namely, automatic price quotations and delivery commitments, and test reports containing information concerning the identity of steel produced for particular customer orders, namely, the chemical, physical, mechanical and other properties of the steel; computerized supply chain management services, namely, supply chain management for the customer, namely, entry of a forecast of the customer's needs for particular steel products and adjustment of specific inventory stock levels at various stages in the supply chain based upon the customer's forecast, namely, automatic entry of individual orders by the computer against an annual purchase order to balance the supply chain to specified inventory or stock levels