Computer software for use over networks, namely, client-server software for use in preparing, analyzing and distributing reports and information concerning billing data, payment data and enterprise payment processes over computer networks; computer software for use over networks, namely, communications software for use in transmitting billing statements and information concerning billing statements over computer networks; client-server software for analyzing and modeling billing data and enterprise payment processes for use in assessing requests for payment and reimbursement submitted to the enterprise and in distributing information relevant to payment decisions and processes; computer software for modeling enterprise payment processing, reviewing bills and requests for payment, predicting the steps required for processing bills and requests for payment and identifying the appropriate recipients of bills and requests for payment; computer software for analyzing the content of bills, billing statements and requests for reimbursement and payment, for applying criteria for invoking payment processes, and for transmitting and routing bills to categories of recipients for review and action, for use in networked enterprises; rules-based computer software for use in the field of information and data retrieval, analysis, modeling, and distribution of data; user manuals supplied as a unit therewith