Transaction any business event that generates data worthy of being captured and stored in a database. Transaction processing systems (tpss) monitor, collect, store, and process data generated from all business transactions. Inputs to functional area information systems, decision support systems, customer relationship management, knowledge management, and e-commerce: handle high volume and large variations in volume efficiently, avoid errors and downtime, record results accurately and securely, main privacy and security. Standard process of tps: data are collected by people/sensors, entered into the computer via an input device. Use source data automation for tps data entry of large volume: system processes data in one of the two ways, batch processing-firm collects data from transactions as they occur, placing them in groups or batches. The system then prepares and processes the batches periodically: on-line processing/real-time transaction processing-business transactions are processed on-line as soon as they occur.