This document discusses emotions and moods in the workplace. It begins by explaining how emotions were originally ignored in organizational behavior research due to a focus on rationality. It then defines emotions, moods, and affect. The document outlines the biology, intensity, frequency, and functions of emotions. It discusses gender differences in emotional expression and constraints on emotions from organizations and culture. Several theories are explained, including affective events theory and emotional intelligence. The document closes by discussing applications of emotions and moods in areas like decision making, motivation, leadership, and job attitudes.