The document is a chapter from an introduction to management textbook. It covers several key topics:
1) It defines management and different types of managers, explaining how managers differ from other employees and how they are classified within organizations.
2) It describes the four main functions of management: planning, organizing, leading, and controlling. It also discusses Mintzberg's managerial roles and Katz's three essential managerial skills.
3) It explores what managers actually do on the job and how their roles are changing with a focus on customer service and innovation.
4) It defines what an organization is and discusses why studying management is important.