This symposium on organization development (OD) consists of three presentations. "A Study of Gender Management Preferences as Related to Predicted Organizational Management Paradigms for the Twenty-First Century" (Cathy Bolton McCullough) reports a study that found that access to diverse management preferences and the manner in which the combination of these diverse preferences is successful can assist human resource professionals in guiding organizations to adapt management styles and expectations to best meet the predicted twenty-first century rules of business. "Considering OD Theories from the Theoretical Foundations of Human Resource Development (HRD) and Performance Improvement" (Thomas J. Chermack, Susan A. Lynham) proposes that core OD theory be addressed from the theoretical foundations of HRD and the perspective of performance improvement, two views that when combined provide a powerful and useful means for identifying and selecting theories of OD for performance improvement. "OD: An Examination of Definitions and Dependent Variables" (T. Marshall Egan) explores 27 definitions of OD published from 1969 to the present. Associated dependent variables are examined. All three papers include substantial bibliographies. (YLB)