Abstract: An Electronic Commerce system enables corporate purchasers and suppliers to electronically transact for the purchase and supply of goods/services. The system includes three major hardware and software components: buyer, supplier and bank/administration. To enable suppliers to supply goods and services online and process electronic orders, several software components are used for operating a supplier processor server and a supplier catalog server. To enable corporate purchasers to purchase products and services online, preferably over the Internet, from suppliers, software is used for operating a customer server to which multiple users may log-on and access the supplier server. An Automated Clearing House (ACH) server may be used to interface with a bank's (ACH) systems.