This document discusses how computers can be used for controlling business operations and decision making. It defines controlling as monitoring plan implementation and making corrections, and decision making as choosing the best solution from multiple alternatives. Computers are used for inventory management, presentations, communications and more. Transaction processing systems support data entry and record transactions. Management information systems collect and share management data. Decision support systems provide tools to aid management, operations, and planning decisions. Overall, computers make controlling and decision making faster and more effective for management.