The three levels of office automation are clear, including: transactional office system: This is the first level of office automation system, mainly dealing with daily office affairs, such as word processing, form processing, document management, etc Systems at this level are often used to improve individual or group productivity, as well as to simplify daily office tasks.

Managed office system: On the basis of transactional office system, managed office system provides a higher level of functions, such as information management, project management, resource management and so on.

Systems at this level support information sharing and collaborative work within the organization, helping to improve overall management efficiency and team collaboration.

Decision-making office system (also known as integrated office system) : This is the highest level of office automation, which not only covers the functions of transactional and management office systems, but also integrates advanced functions such as data analysis and data mining to support the strategic decision-making and planning of the organization.

Systems at this level help managers make more informed decisions by providing accurate data analysis and predictions.

These three levels together constitute a complete system of office automation, from basic transaction processing to advanced management and decision support, layer by layer, to provide a comprehensive automation solution for all levels of the organization.