This document discusses the roles and responsibilities of a manager. It defines a manager as a person responsible for a part of a company. The key functions of a manager are planning, organizing, staffing, leading, and controlling. Managers fulfill interpersonal roles like leader and liaison, informational roles like monitor and disseminator, and decisional roles like entrepreneur and negotiator. Effective manager skills include technical skills, human skills, and conceptual skills. Common manager activities are traditional management, communication, human resource management, and networking.