Computer integration network for channeling customer orders through a centralized computer to various suppliers

An electronic requisitioning system for channeling customer requisition orders to internal suppliers and outside vendors, and processing invoices using a centralized computer system. A customer accesses an electronic item catalog and requisition form to place an order transmitted to the central computer system. Requisitions are segregated by supplier and sent as purchase orders to appropriate internal suppliers and outside vendors that ship the items directly to the customer. Invoices are centrally processed and the customer receives a combined invoice for all items requisitions and may transmit payment back through to the central computer system.