What system assists in tasks such as document management and data management in an office?

The correct answer is office automation system. This type of system is specifically designed to facilitate the management and processing of information in an office environment. It encompasses a range of tools and technologies used to streamline administrative tasks, improve data management, and enhance document handling.

Office automation systems typically include software applications for word processing, spreadsheets, email, and database management, which collectively help increase productivity and efficiency within an organization. By automating routine tasks, these systems allow staff to focus on more strategic activities.

Other types of systems mentioned, while beneficial in their specific contexts, do not primarily focus on office management. A knowledge work system is more oriented towards supporting knowledge workers by providing them with tools to create, manipulate, and store knowledge. An expert system employs artificial intelligence to replicate the decision-making ability of a human expert, which is not focused on document management. A decision support system analyzes data to assist in making informed decisions but does not provide the same level of automation of office tasks as office automation systems.