Apparatus for recording, transmission or reproduction of sound and images; Computer software platforms, downloadable, for tracking and managing books of accounts in a general ledger for cash and investment assets and liabilities and tracking investment performance analytics related to such assets and liabilities; Downloadable cloud-computing software for tracking and managing books of accounts in a general ledger for cash and investment assets and liabilities and tracking investment performance analytics related to such assets and liabilities; Downloadable computer software for application and database integration; Downloadable computer software for document management; Downloadable computer software for producing financial models; Downloadable middleware for software application integration; Downloadable mobile applications for tracking and managing books of accounts in a general ledger for cash and investment assets and liabilities and tracking investment performance analytics related to such assets and liabilities; Mobile computing and operating platforms consisting of data transceivers, wireless networks and gateways for collection and management of data; Downloadable accounting software for use in the construction industry for contract bidding and job accounting; Downloadable computer software for providing an on-line database in the field of transaction processing to upload transactional data, provide statistical analysis, and produce notifications and reports