Controlling is one of the key managerial functions that involves monitoring performance, comparing results to standards, and taking corrective actions. There are three main types of organizational control systems: output control using budgets and goals, behavioral control through direct supervision, and bureaucratic control via rules and procedures. Additionally, clan control focuses on shared values and norms to influence behavior within an organization. Effective control requires establishing standards, measuring performance, identifying deviations, and implementing appropriate actions to minimize variations from objectives.