Active Data Online Accounting System is an asp.net 3.5 accounting information system. The system can record, store and find accounting journal entries, manage recurring entries automatically, provide financial control and an audit trail, close all temporary accounts and generate a balance sheet and a profit and loss statement, record and report on cash flow, record, and summarise Australian GST. It is consistent with generally accepted accounting principles. The chart of accounts is flexible. The system can be set up to manage unlimited subcategories and accounts, in any hierarchy, and even controlling and contra accounts. There are four special purpose journals -- cash receipts, sales, cash payments, and purchases -- and a general journal. The system is written for Microsoft .net 3.5. It supports Microsoft SQL Server, Microsoft Access, MySQL, PostgreSQL and Oracle.