The call number is the address of the book in the library.
In Drexel Library, we use Library of Congress Classification which groups titles by subject matter.
The following call number ranges will help you get started.
HD58.7 Organizational behavior, Corporate culture
HD58.8 Organizational change
HD69.C6 Management consulting
HF5448.8-5548.85 Industrial psychology, Job stress
HF5449.5549.5 Personnel management and development, Training