This document discusses workforce diversity and how it relates to organizational behavior. It defines workforce diversity as the similarities and differences among employees in terms of various demographic factors. It also discusses two levels of diversity: surface-level diversity, which includes visible characteristics like gender, race, age; and deep-level diversity, which includes less visible characteristics like personality and values. The document provides examples of how surface-level similarities may not necessarily lead to positive work interactions if there are differences in deep-level characteristics. It also discusses how various biographical characteristics like age, gender, race, disability are relevant to organizational behavior.